The Bill Murray quote on Daniel Wayne Armstrong’s site is a good one, really makes you think. The site is great, lots of useful content about Linux and the Raspberry Pi, plus OpenWRT router mods. I have learned a lot ( and used it ) by skimming through his posts. He also has some interesting quotes like the Bill Murray one below.
Bill Murray on staying relaxed and how success will follow:
http://www.circuidipity.com/20140918.html
In January 2015 I created a post about automatically creating a status page for a Linux server that I have. Typically this is put under a restricted directory and allows you to see a snapshot of what is happening with the server. I run it by putting the scripts in the /etc/cron.hourly directory on a Linux PC and a Raspberry Pi running Linux.
It serves as a simple way to check up on the server without having to use a tool such as Webmin that requires a login. It also keeps a trail of log files that get rotated on a monthly basis, so there is always a few old ones around to track down any problems and patterns in the operation.
I have found this information useful when I have traced down malfunctions that can occur when setting up a server and also when I was trying to get a webcam up and running and had the USB bus hang up a few times when the cam was overloaded with too much light.
In the new script file I fixed a bug by adding parenthesis around a line that I was trying to echo and I added code to run the w command to show a quick picture on who is logged in, how long the server has been up and running and the values for the average load on the server at the 1, 5 and 15 minute marks.
#!/bin/dash # Remove old log rm /var/www/status/log.txt # Print logged outputs into new log.txt date >> /var/www/status/log.txt echo >> /var/www/status/log.txt tail /var/log/syslog >> /var/www/status/log.txt echo >> /var/www/status/log.txt free >> /var/www/status/log.txt echo >> /var/www/status/log.txt df -h >> /var/www/status/log.txt echo >> /var/www/status/log.txt # Top memory using processes http://www.commandlinefu.com/commands/view/3/display-the-top-ten-running-processes-sorted-by-memory-usage #ps aux | sort -nk +4 | tail >> log.txt echo "USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND" >> /var/www/status/log.txt ps aux | sort -nrk 4 | head >> /var/www/status/log.txt echo >> /var/www/status/log.txt # Logged in User info using w command w >> /var/www/status/log.txt echo >> /var/www/status/log.txt echo >> /var/www/status/log.txt # Copy log.txt into the full log that is collected cat /var/www/status/log.txt >> /var/www/status/fulllog.txt # Create a free standind copy of the process tree pstree > /var/www/status/pstree.txt
I also created a version of the script for a desktop Linux PC that does not have Apache installed. In it I use a DIR variable to contain the directory that I want the log.txt file stored.
#!/bin/dash # User defined variables # No trailing / on DIR! DIR=/home/erick/status # Remove old log rm $DIR/log.txt # Print logged outputs into new log.txt date >> $DIR/log.txt echo >> $DIR/log.txt tail /var/log/syslog >> $DIR/log.txt echo >> $DIR/log.txt free >> $DIR/log.txt echo >> $DIR/log.txt df -h >> $DIR/log.txt echo >> $DIR/log.txt # Top memory using processes http://www.commandlinefu.com/commands/view/3/display-the-top-ten-running-processes-sorted-by-memory-usage #ps aux | sort -nk +4 | tail >> log.txt echo "USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND" >> $DIR/log.txt ps aux | sort -nrk 4 | head >> $DIR/log.txt echo >> $DIR/log.txt # Logged in User info using w command w >> $DIR/log.txt echo >> $DIR/log.txt echo >> $DIR/log.txt # Copy log.txt into the full log that is collected cat $DIR/log.txt >> $DIR/fulllog.txt # Create a free standing copy of the process tree pstree > $DIR/pstree.txt
In the /etc/cron.monthly directory I have created a file that is called status-log-rotate and it will save backup copies of 2 months worth of the full concatenated server status logs.
#! /bin/bash DIR=/home/erick/status mv $DIR/fulllog.txt.1 $DIR/fulllog.txt.2 mv $DIR/fulllog.txt $DIR/fulllog.txt.1
For the Raspberry Pi which has an SD card that I am trying to be conscious of writing to often. I have recently made some modifications to put the /tmp folder onto RAM using tmpfs. I create the hourly log underneath a folder there. Daily via a script it cron.hourly it gets concatenated into a daily log which is under a status folder that has restricted access. This gets appended once per day to the fulllog which actually lives on the SD card. The end result, no multiple hourly writes to the log file, just one append to the full log per day. The only downside is if the power drops and then some log entries will be lost for the day.
#!/bin/dash # Set DIR, on Pi this is a temp location for log DIR=/tmp/web # Set fixed DIR FIXDIR for files that have to be stored on SD card # Nevermind, just make a daily log and then copy that to the full log daily. #FIXDIR=/var/www/status # Remove old log rm $DIR/log.txt # Print logged outputs into new log.txt date >> $DIR/log.txt echo >> $DIR/log.txt tail /var/log/syslog >> $DIR/log.txt echo >> $DIR/log.txt free >> $DIR/log.txt echo >> $DIR/log.txt df -h >> $DIR/log.txt echo >> $DIR/log.txt # Top memory using processes http://www.commandlinefu.com/commands/view/3/display-the-top-ten-running-processes-sorted-by-memory-usage echo "USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND" >> $DIR/log.txt ps aux | sort -nrk 4 | head >> $DIR/log.txt echo >> $DIR/log.txt # Logged in User info using w command w >> $DIR/log.txt echo >> $DIR/log.txt echo >> $DIR/log.txt # Copy log.txt into the full log that is collected cat $DIR/log.txt >> $DIR/dailylog.txt # Create a free standing copy of the process tree pstree > $DIR/pstree.txt
#! /bin/bash DIR=/tmp/web FIXDIR=/var/www/status echo "----------------------------------------------" >> $DIR/dailylog.txt date >> $DIR/dailylog.txt echo "----------------------------------------------" >> $DIR/dailylog.txt cat $DIR/dailylog.txt >> $FIXDIR/fulllog.txt rm $DIR/dailylog.txt
Below is what the logcreate script will output to the log.txt file on a Raspberry Pi that I have running as a web server.
Sun Jul 12 14:17:01 EDT 2015
Jul 12 13:47:51 raspberrypi dhclient: DHCPACK from 192.168.1.1
Jul 12 13:47:52 raspberrypi dhclient: bound to 192.168.1.17 -- renewal in 40673 seconds.
Jul 12 13:59:01 raspberrypi /USR/SBIN/CRON[28010]: (erick) CMD (aplay /opt/sonic-pi/etc/samples/guit_e_fifths.wav)
Jul 12 13:59:07 raspberrypi /USR/SBIN/CRON[28009]: (CRON) info (No MTA installed, discarding output)
Jul 12 14:00:01 raspberrypi /USR/SBIN/CRON[28013]: (erick) CMD (/home/erick/fswebcam/cron-timelapse.sh >> timelapse.log)
Jul 12 14:00:23 raspberrypi /USR/SBIN/CRON[28012]: (CRON) info (No MTA installed, discarding output)
Jul 12 14:01:01 raspberrypi /USR/SBIN/CRON[28022]: (root) CMD (/home/erick/bin/usbreset /dev/bus/usb/001/004)
Jul 12 14:01:02 raspberrypi /USR/SBIN/CRON[28021]: (CRON) info (No MTA installed, discarding output)
Jul 12 14:09:01 raspberrypi /USR/SBIN/CRON[28053]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Jul 12 14:17:01 raspberrypi /USR/SBIN/CRON[28064]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
total used free shared buffers cached
Mem: 445804 424488 21316 0 106768 260516
-/+ buffers/cache: 57204 388600
Swap: 102396 0 102396
Filesystem Size Used Avail Use% Mounted on
rootfs 6.3G 3.1G 3.0G 51% /
/dev/root 6.3G 3.1G 3.0G 51% /
devtmpfs 214M 0 214M 0% /dev
tmpfs 44M 240K 44M 1% /run
tmpfs 5.0M 8.0K 5.0M 1% /run/lock
tmpfs 88M 0 88M 0% /run/shm
/dev/mmcblk0p5 60M 19M 41M 32% /boot
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2071 0.0 3.0 24896 13652 ? Ss Jun28 2:24 /usr/sbin/apache2 -k start
www-data 27745 0.0 1.5 25412 7084 ? S 09:58 0:00 /usr/sbin/apache2 -k start
www-data 27744 0.0 1.5 24960 6760 ? S 09:58 0:00 /usr/sbin/apache2 -k start
www-data 27743 0.0 1.5 25428 7116 ? S 09:58 0:00 /usr/sbin/apache2 -k start
www-data 27742 0.0 1.5 25396 7036 ? S 09:58 0:00 /usr/sbin/apache2 -k start
www-data 27538 0.0 1.5 25396 7032 ? S 06:25 0:00 /usr/sbin/apache2 -k start
www-data 27502 0.0 1.5 25404 7036 ? S 06:25 0:00 /usr/sbin/apache2 -k start
www-data 27501 0.0 1.5 25396 7044 ? S 06:25 0:00 /usr/sbin/apache2 -k start
www-data 27747 0.0 1.3 24936 6188 ? S 09:58 0:00 /usr/sbin/apache2 -k start
www-data 27746 0.0 1.3 24936 6188 ? S 09:58 0:00 /usr/sbin/apache2 -k start
14:17:02 up 14 days, 12:56, 1 user, load average: 0.00, 0.01, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
erick pts/0 192.168.1.5 14:04 10:39 1.70s 1.70s -bash
I had a Bonsai tree that was neglected at times over the winter when we were away from home. It was not getting enough water, dried out and lost all of it’s leaves. I had a few other plants die off but most of them are easily replaced from commonly obtainable seeds. This Bonsai however was a plant that I had for about 10 years and it was disappointing to lose it.
In early May, I pulled it out of it’s pot and put it on a pile to be discarded. Luckily the place where it was put was in the shade. Plus this year (2015) we have received an exceptional amount of rain through June, more than double the average. All of this helped to keep it alive at some low level, even without soil.
In mid-July, it started to get a few little green leaves on it. What a miracle, it had some life left in it after all! Now it is back in the pot and I will eventually see how many branches are alive.
This is the second plant that has come back from the dead this year, the Bonsai along with a Ginko Biloba Tree that came back from the dead.
Frequently when using the non command line version of PHPList which I have loaded on my service providers server, I have to hit Process Queue multiple times for a message. I have read a lot of posts online complaining this issue. I have done some troubleshooting of it myself by turning on the verbose feature in PHPList and I am still at a loss as to what it gets stuck on and then stops processing the queue.
PHPList works great, I love it for all that it does and does well. My one complaint is the Process Queue issue and from reading a bunch of posts online I have successfully patched together a solution.
This code can be executed on the server where PHPList lives if they will let you run a wget command from a CRON entry, some won’t. In my case I opted to simply run the command from a Raspberry Pi server that I have that runs 24/7. It is simple a looping script that does the equivalent of hitting the “Process Queue” button on PHPList at regularly timed intervals and detected when the queue has been processed. I have seen several examples of using wget to be fired off every 5 minutes to do this, but that means it gets run every 5 minutes, all day, every day. Why not run something that can be scheduled for a time and then runs to completion which this script does.
This script also produces a log file that can be copied to a location viewable via the server so you can double check to see if all ran OK. I see this mostly as a debug feature and it could potentially be turned off along with some of the “echos” of text. Except for the one in the else-if, it is an error to have an empty else-if in a bash script.
#!/bin/bash # Controller Script for PHPlist Process Queue # Erick Clasen blog.oils-of-life.com 05/16/2015
# User defined variables # No trailing / on DIR! DIR=/home/erick/php-proc LOG=php-pq.log # Time to sleep between loop iterations. TIME=3m # Max number of loops, so the script breaks out if for some reason it fails to complete. LOOPS=100 # Publish a copy of the log to the following directory PUBDIR=/home/erick/public_html
# wget having trouble with some options so simply switch to the dir we want it to work in. cd $DIR
x=1 echo Start------------- >> $LOG
# While loop, breaks out if done or at LOOPS as a guard against #infinite loop. while [ $x -le $LOOPS ]; do
# Timestamp in DDMMYYYY_HHMM-SS (UTC) timestamp=$(date -u +"%d%m%Y_%H%M-%S")
echo $x $timestamp echo $x $timestamp >> $LOG
x=$(( $x + 1 ))
# Use wget to run process queue with login and password provided wget 'your_url_here.com/phpList/admin/?page=processqueue&login=phplist&password=your_password_here'
# Test to see if PHPlist process queue has completed. if grep -q "Finished, Nothing to do" $DIR/index.* then # Exit from Loop with a break, mark log,remove index files that wget fetched, break out. echo All Done! Breaking Out echo All Done!--------- >> $LOG echo ------------------ >> $LOG # Publish Log, Optional cp $LOG $PUBDIR/$LOG rm $DIR/index.* break else # Nothing Happens echo Keep Running... fi
# Sleep for TIME echo ------- Sleeping Process --------
sleep $TIME;
done;
Process Bounces can be run from a script as well…
#!/bin/bash # Controller Script for PHPlist Process Bounces # Erick Clasen blog.oils-of-life.com 05/16/2015
# User defined variables # No trailing / on DIR! DIR=/home/erick/php-proc LOG=php-pq.log
# Publish a copy of the log to the following directory PUBDIR=/home/erick/public_html
# wget having trouble with some options so simply switch to the dir we want it $ cd $DIR
# Use wget to run process queue with login and password provided wget 'your_url_here.com/phpList/admin/?page=processbounces&login=phplist&password=your_password_here' echo ---------------------------- >> $LOG echo BOUNCES HAVE BEEN PROCESSED! >> $LOG echo ---------------------------- >> $LOG # Publish Log, Optional cp $LOG $PUBDIR/$LOG rm $DIR/index.*
These entries run Process Queue every Monday, Wednesday and Friday (1,3,5) at 4:15AM and Process Bounces at 12:15AM on the first day of the month. Nothing magic about those settings, you can set them any way you wish. I figure starting the process in the wee hours of the morning will allow people to receive the email by the time that they wake and first check their mail. I set the time to 15 after so it won’t run at the same time as some processes that I have set to run on the hour. Sending mail on weekdays keeps people from having to deal with more email than they might like on the weekends.
15 04 * * 1,3,5 /home/erick/php-proc/php-pq.sh 15 00 1 * * /home/erick/php-proc/php-pb.sh
If you must make PHPList process the queue now and don’t want to wait for the CRON task. Two options are available, do it the via the normal way from the PHPList admin website or you can use something as simple as a CGI script to force the php-pq.sh script to execute. Below is an example of a dirt simple CGI script. It prints out the tail of the php-pq.log and runs the php-pq.sh script. Php-pq.log is the log of the previous automatic processing event and then goes ahead and fires off the Process Queue Override by running the script. Basically the act of loading the page makes it run. I keep my cgi-bin directory locked down so no one outside of a few IP addresses can get to the files there. But it would be fairly harmless if someone did, the worst that happens is that the queue gets processed.
#!/bin/bash echo "Content-type: text/html" echo "" echo "PHPList Automatic Process Queue Override" echo "" echo "
PHPList Automatic Process Queue Override from host $(hostname -s &)
" echo "" echo "
$(tail /home/erick/php-proc/php-pq.log &)
" echo "" echo "
Information generated on $(date &)
" echo "" echo "Processing..."
echo "
$(/home/erick/php-proc/php-pq.sh &)
"
echo "
"
I am working on taking some notes on some changes I have made to the PHPList config.php file and will be posting on this in August 2015.
I have a Ginko Biloba tree that was planted in approximately 2009 from a seedling and it was pulled out of the ground in fall-2013 while moving. It sat indoors over the winter, not a good idea for deciduous trees as they need to go through the cold of winter to set their clocks for the Spring budding. It was watered off and on when it was dormant that Winter, but it was mostly dried out feeling. In the Spring the buds were dry and the branches turned pretty hard and dead feeling, snapping off easily. I planted it in the ground in late April 2014 and it sat there dead looking for the entire season.
I decided not to give up on it and pull it out as I have heard that sometimes deciduous trees will come back the following year. The winter of 2014-2015 was particularly harsh, one of the coldest in 100 years with the temperatures reaching up to -28 F below here. In the Spring, still nothing, but I waited and waited to see if anything would happen and if it didn’t I would plant a tree in it’s place in 2016. I was already considering where I might get another small Ginko Biloba tree.
2015 provided a hot May and a wet June, so the ground was good and warm early and had plenty of moisture. One day in mid-June I was mowing the lawn and cutting close to a lot of obstacles such as the tree, when I stopped dead in my tracks as I noticed what appeared to be weeds growing around the base of it. But, something looked different about the “weeds” and I stopped just in time as to not mow them down. Sure enough it was actually new growth sprouting near the base of the Ginko tree.
For this year I will let the new growth run wild. Leaving the dead stick part of the plant as a marker so I don’t mow or step on the shoots coming up. Next year I will pick the best shoot and let it thrive, cutting the dead growth and the runty shoots that may appear.
It is amazing how nature surprises you just when you least expect it. One of the oldest species of tree the Ginko Biloba has a few tricks up it’s sleeve for survival after all.
Inspired by Diners, Drive-ins and Dives, episode aired February 24, 2014, between 11-12PM EDT.
I have made pancakes with potatoes and onions before but, watching this episode made me experiment with paprika, garlic, old bay. Plus I generally like to put a little bit of curry and or turmeric in too, it helps stabilize the potatoes as they tend to oxidize quickly once chopped. I have noticed red potatoes are better in this regard; they take a long time to discolor.
4 medium size potatoes
1 small onion
2 clove garlic
2 heaping tbsp white flour
1 egg, I used a large one
1 tsp turmeric or curry, more if you like
1 tsp baking powder
Oil or fat for the fan frying. I used coconut oil and bacon fat.
The following to taste
Salt
Paprika
Old Bay
1. Cut up the potatoes and onions, add in garlic cloves and run through a food processor on chop mode.
2. Dump into a bowl and add salt, mix.
3. In a second bowl add flour and other dry ingredients, mix thoroughly.
4. Start preheating pan, put the oil and fat in it. This is not deep frying, so coat the pan but coat generously.
5. Add egg to potato, onion and garlic bowl and mix thoroughly.
6. Add the premixed dry ingredients in slowly while mixing in. Slowly prevents lumps of flour from forming.
7. When the pan is hot enough, like when a drop of water will sizzle in it; drop in a serving spoon sized amount of the mixture and flatten it out a bit with a spatula.
8. After a few seconds, when it has set, shimmy the pan around so the oil can get under it and all around the edges.
9. When it is golden brown on the bottom flip it over and get the other side golden brown. This requires a guess, based on size the time may vary. The first few might get flipped over a few times until you get the timing down.
10. When done, place on a plate with paper towels to absorb excess oil. I like to keep them in the over on warm until I am done with the whole batch.
These pancakes are good as a side to many dishes and are a different way to use potatoes. The DDD episode shows them topped with goulash which looked great. The first time I made them I used them as “buns” for a nice grass-fed beef hamburger (Wegmans has great grass-fed beef). It was a great tasting and filling too.
It is easy to set up a simple CRON job to run a sound on the top of the hour by running aplay on a Linux machine. Something like this would also work on a Mac with minor changes, afplay is the default command line player for Mac, CRON works the same. For Windows, I have not tried it but task scheduler, every hour and there must be some easy command line program out there to fire off, that stuff has been around since DOS.
aplay works with wave files so you can use oggdec to convert ogg files to wav. A lot of sound theme files come in ogg or wav. aplay and mplayer come installed in Ubuntu at least by default in 14.04 LTS, which I am running. If not a simple…
sudo apt-get install aplay
…or…
sudo apt-get install mplayer
…will get them installed.
Oggdec is part of a very small install package, takes seconds to install.
To install…
sudo apt-get install vorbis-tools
To convert OGG ausio file to a WAV audio file…
oggdec filename.ogg
The sound themes are located at /usr/share/sounds . If you go there and try out the sounds you might find one that sounds good to you for an hourly chime.
Two level tree of /usr/share/sounds, using the tree command. If you don’t have it get in a few seconds using…
sudo apt-get install tree
Output of tree command show 2 levels below /usr/share/sounds
(tree /usr/share/sounds -d -L 2)
/usr/share/sounds
├── alsa
│ ├── Front_Center.wav
│ ├── Front_Left.wav
│ ├── Front_Right.wav
│ ├── Noise.wav
│ ├── Rear_Center.wav
│ ├── Rear_Left.wav
│ ├── Rear_Right.wav
│ ├── Side_Left.wav
│ └── Side_Right.wav
├── fLight__2.0
│ ├── Copyright
│ ├── index.theme
│ └── stereo
├── freedesktop
│ ├── index.theme
│ └── stereo
├── Fresh_and_CLean
I went to a site see link below and downloaded two sound themes (fLight 2.0 and Fresh and Clean, the third one on the site was a dead link ) and tried out the sounds. I found that the Message sound in the fLight 2.0 theme was a pleasant but catchy enough sound to be heard at a distance and over any music I might be playing at the time the CRON job runs.
http://www.ubuntuvibes.com/2010/08/3-awesome-sound-themes-for-ubuntu.html
The CRON job that runs to do the hourly sound is..
00 09-23 * * * aplay /usr/share/sounds/fLight__2.0/stereo/Message.wav
It will produce a sound from 9AM to 11PM and uses the Message.wav which I converted from an ogg to a wav file…
I have attached the Message.wav below for your listening pleasure!
So far I have not switched my overall sound theme from the Ubuntu default, but I might try out the two themes that I have downloaded for variety.
It is nice to have a desktop wallpaper that is not static, I like to see some outdoor scene that has a good view and a dynamic sky. Wyoming certainly has some ever changing skies and nice terrain so I have a wallpaper background set to show the Cloud Peaks Wilderness in Wyoming that updates every hour.
It is possible to load a JPG file periodically from a source using the Linux built-in wget command. In the example below, I am loading a scene from Cloud Peak Wyoming that is captured by a US Forest Service Webcam. It is loading right into my home folder, it could be put in any place that you prefer.
There is a nice bunch of pictures taken by the Forest Service from all over the country and they provide some nice high resolution scenery. See the links at the bottom of this post.
#! /bin/bash rm /home/erick/cpwa1_large.jpg wget http://www.fsvisimages.com/images/photos-large/cpwa1_large.jpg
The code first removes the old copy of the image and then it uses the wget command to fetch a new copy.
It is not necessary to modify .wgetrc to use wget, but I put this here as an FYI. There is a configuration file for wget. It is located at /usr/local/etc/wgetrc. More info on wget locations. You can make a copy of it and put it in your home directory. Once in the home directory any modifications to it will work for your user profile. I have mine modified to do a few non-standard things, one is to use timestamping which will make wget only download when the file it is trying to download is newer than the local copy.
# Set this to on to use timestamping by default: timestamping = on
Secondly, I also added a line at the end of the file that puts an option for wget for limiting the rate of downloading. Otherwise wget will run as fast as possible and will use the entire bandwidth. This option can be used on a case by case basis by putting in the line when wget is called as well. Doing this makes it so wget doesn’t slow down your connection to the Internet a lot and doesn’t hit the server hard with high speed downloads, important if you are downloading multiple large files.
limit-rate=20k
It is also possible to add a bit of a delay between connections when downloading. This avoids hammering the server that you are downloading from when downloading multiple files. This makes it easier on the server load and makes your download activity less likely to be obnoxious to the folks running the server that you are downloading from. Obnoxious down-loaders and site scrapers are more likely to get banned I would imagine if someone notices a spike in server load and pins it down to the IP address.
# It can be useful to make Wget wait between connections. Set this to # the number of seconds you want Wget to wait. wait = 1
Some sites go as far as prohibiting downloads unless the user agent has a string inside of it. I didn’t do this yet as I have not had a problem with this issue. But it is possible to set the user-agent via --user-agent=“Acceptable String Here”
More on user-agent modification
01 08-22 * * * /home/erick/cpwa1/wget-cpwa1.sh
Using crontab -e, a line can be loaded into your CRON file to run the script periodically. The one above runs every hour 1 minute after the hour between 8AM and 10PM. There is no sense in loading nighttime pictures so that is why the times are bounded to load pictures during daylight hours ( right now) for Mountain Daylight Time. The picture I load is update around 59 minutes after the hour so loading 1 minute after the hour provides a bit of a guard band of time.
USDA Forest Service Real Time Image Description Page
USDA Forest Service Real Time Image Gallery
When you setup a new Host Gator account the public_html directory contains a default.html file that will come up when you navigate to your domain.It contains useful links to…
Instead of deleting the file when you create your own content, just create a folder under public_html, I created one called default. Then put the default.html file there and you will always have access to these handy links.
I found a nice PHP script for Wake on LAN. I loaded it on the Raspberry Pi that I have and configured it for my system. The Raspberry Pi runs 24/7, so I can just navigate to a web page that it serves, hit a button and start up one of my machines at home from anywhere. Mostly this is useful for the starting my Linux file server remotely but I do use it to fire off the desktop too.
REMOTE WAKE/SLEEP-ON-LAN SERVER
=========================
This is simple webapp that runs on your Raspberry Pi to turn it into a remotely accessible Wake/Sleep-On-LAN Server. [Follow the detailed tutorial](http://www.jeremyblum.com/2013/07/14/rpi-wol-server/) on my website for instructions on how to get this working, and forwarded through a router. This is very useful when you have high-powered machine that you don’t want to keep on all the time, but that you want to keep remotely accessible for Remote Desktop, SSH, FTP, etc.
http://www.jeremyblum.com/2013/07/14/rpi-wol-server/
It is rare when something works right out of the box. But, this did, I followed Jeremy Blum’s instructions and within a few minutes I had this working. It has a nice drop-down menu where you can select a computer. It pings it to see if it is awake, then you can wake it from anywhere in the world. Once the WOL packet is sent, the application keeps pinging the PC at a defined interval and you can see when it wakes. I have not tried the sleep functionality as I am using it with Linux PC’s and his outline covers Windows machines. I am sure the code could me modified to shut down a Linux PC somehow. Perhaps it automatically SSH’s in and sends a shutdown command, something like that. I have my Linux server set to shutdown automatically so I don’t need this functionality myself.
It is configurable through an easily understood config.php file as well. You can set the computers name and IP address, MAC address, timing between pings, amount of times to ping the machine and etc.