Check These Out
Deletes lines from START to END, inclusive. For example +4,10d will delete line 4, 5, ..., 10. Just like the vi command :4,10d does it.
This will run them at the same time and timeout for each host in ten seconds. Also, mussh will append the ip addres to the beginning of the output so you know which host resonded with which time.
The use of the sequence expression {1..50} is not specific to mussh. The `seq ...` works, but is less efficient.
(relies on 'imagemagick')
This command will convert all .pdf files in a directory into a 800px (wide or height, whichever is smaller) image (with the aspect ratio kept) .jpg.
If the file is named 'example1.pdf' it will be named 'example1.jpg' when it is complete.
This is a VERY worthwhile command! People pay hundreds of dollars for this in the Windows world.
My .jpg files average between 150kB to 300kB, but your's may differ.
Easily convert numbers to their representations in different bases. Passing
"ibase=16; obase=8; F2A"
to bc will convert F2A (3882 in decimal) from Hex to Octal, and so on.
When dealing with system resource limits like max number of processes and open files per user, it can be hard to tell exactly what's happening. The /etc/security/limits.conf file defines the ceiling for the values, but not what they currently are, while
$ ulimit -a
will show you the current values for your shell, and you can set them for new logins in /etc/profile and/or ~/.bashrc with a command like:
$ ulimit -S -n 100000 >/dev/null 2>&1
But with the variability in when those files get read (login vs any shell startup, interactive vs non-interactive) it can be difficult to know for sure what values apply to processes that are currently running, like database or app servers. Just find the PID via "ps aux | grep programname", then look at that PID's "limits" file in /proc. Then you'll know for sure what actually applies to that process.
This command will create a popup reminder window to assist in remembering tasks
http://i.imgur.com/2n7viiA.png is how it looks when created
(relies on 'imagemagick')
This command will convert all .pdf files in a directory into a 800px (wide or height, whichever is smaller) image (with the aspect ratio kept) .jpg.
If the file is named 'example1.pdf' it will be named 'example1.jpg' when it is complete.
This is a VERY worthwhile command! People pay hundreds of dollars for this in the Windows world.
My .jpg files average between 150kB to 300kB, but your's may differ.
Using this command you can track a moment when usb device was attached.
sort -R randomize the list.
head -n1 takes the first.
