Select a file/folder at random.

(1) don't run twice, or the same folder will occur in $PATH.

(2) otherwise you need to start a new terminal

a pretty simple script when running java programs from command line

-n is very important, otherwise it's string comparison

Pros: the format is very simple, there is no need to show every columns, and full command with args

the first column is memory consumption %

the second column is pid

the third is just the command (without full arguments, most application's arguments are too long)

You can decide which application to kill then.

Deletes capistrano-style release directories (except that there are dashes between the YYYY-MM-DD)

this command will install the packages which provides the libraries you need to link with, e.g. when you compile something needs opengl libraries:

gcc -o testgl testgl.c -lGLEW -lGL -lGLU -lglut

you can use `/usr/lib/libGLEW.so /usr/lib/libGL.so /usr/lib/libGLU.so /usr/lib/libglut.so'

... plus do a sort according frequency

A shorter version

Works on current directory, with built-in sorting.

Will work with filenames with spaces inside. Will not break in case of someone making directory that matches *.pm. And sorts from largest. Where largest is file size, not line count.

OpenVZ: Get disk quota usage for your VEID

% lsof -v

lsof version information:

revision: 4.78

"sort_csn" is a function to sort a comma separated list of numbers.

Define the the function with this:

sort_csn () { echo "${1}" | sed -e "s/,/\n/g"| sort -nu | awk '{printf("%s,",$0)} END {printf("\n")}' | sed -e "s/,$//"; }

Use the function like this:

sort_csn 443,22,80,8200,1533,21,1723,1352,25

21,22,25,80,443,1352,1533,1723,8200

One example where this is useful is when port scanning with nmap and getting a list of open ports in random order. If you use Nessus, you may need to create a scan policy for that set of specific ports and it is clearer to read with the port numbers in ascending order (left to right).

Caveat: no spaces in the comma separated list (just number1,number2,number3,etc).

A variation of this to sort a comma separated list of strings:

sort_css () { echo "${1}" | sed -e "s/,/\n/g"| sort -u | awk '{printf("%s,",$0)} END {printf("\n")}' | sed -e "s/,$//"; }

usage:

sort_css apples,pears,grapes,melons,oranges

apples,grapes,melons,oranges,pears

Where COMMAND is the process(es) name. I prefer to get all states but you may add ESTABLISHED in the grep regex.

-nP flags are optional and UDP is irrelevant for established connections

Similar but using the process id:

Counts the frequency of words in a file

This one-liner will output installed packages sorted by size in Kilobytes.

Show the top file size in human readable form