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While a dd is running in one terminal, open another and enter the while loop. The sample output will be displayed in the window running the dd and the while loop will exit when the dd is complete. It's possible that a "sudo" will need to be inserted before "pkill", depending on your setup, for example:
while pgrep ^dd; do sudo pkill -INFO dd; sleep 10; done
This one is for OS X users: sort -R and shuf aren't available in Lion (10.7.5)
Processes biglion quantity of sold ebay coupons/bonus codes, so you can know approximate count of users who buyed the coupons and when sales are come up again.
You can change sleep parameter so script will work slowly or faster (default is 5 seconds).
Additional requirements: curl
Standart tools used: awk, date, cat, grep (bash)
This one works without an external program (watch). Witch is not await able all the time. HINT: use CTRL + C to exit the loop.
If you're a slow reader and/or you like to ponder, adjust the sleep time to be longer
This has saved me many times while debugging timeout issues to "too many open files" issues. A high number of the order of thousand, indicates that somewhere connection is not being closed properly.
If you are on your bed, waching a movie or if you are downloading something, but you whant to sleep. You can use these easy command to power off after X time. The time is in sec. if you whant to wait 1 H, use:
sleep 3600; poweroff
This will cause their computer to make a beeping sound after a random amount of time until it is killed.
The closer to zero the better.Credit to TheSeb on macrumors: http://forums.macrumors.com/showthread.php?t=1289884
This command is good for a cron job or where you may have a lot of jobs potentially coincide on a scarce resource (like writing files back to a file server all at once). This will insert a sleep of a random amount of time up to an hour.
for OS X
Execute a process or list of commands in the given interval and output the difference in output.
Case insensitive. Also you can pull in the songs from a blacklist, one per line -
while :; do (mpc current | grep -i -f blacklist.txt && mpc next); sleep 5; done
http://www.joachim-breitner.de/projects#screen-message now also supports reading stdin continuously to update what it shows, different ?slides? separated by a form feed character. Here, we feed the current time into it each second to create a large clock.
Ssh to your co-worker's box and watch them go crazy when the cd player ejects