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Commands by axelabs

Terminal - Commands by axelabs - 11 results

[ $V ] || : $((V++)) && echo $V

2012-06-15 16:48:03

User: axelabs

Functions: echo

Tags: loop builtin increment :

Up
Down

Use the builtin ':' bash command to increment variables

I just found another use for the builtin ':' bash command. It increments counters for me in a loop if a certain condition is met...

: [arguments]

No effect; the command does nothing beyond expanding arguments and performing any specified redirections. A zero exit code is returned.

rsync -avz ~/src ~/des/

2012-06-01 15:08:12

User: axelabs

Functions: rsync

Tags: copy rsync sync synchronize

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Synchronize directory copy

rsync will copy the source directory into destination and any subsequent run will synchronize only the changes from the source.

date -d '2011-12-15 05:47:09' +"epoch: %s or format: %Y/%m/%d"

2011-12-16 18:43:36

User: axelabs

Functions: date

Tags: date time epoch

Up
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Time conversion/format using the date command

egrep -i " connected|card detect|primary dev" /var/log/Xorg.0.log

2011-02-24 18:04:04

User: axelabs

Functions: egrep

Tags: video egrep xorg

-1

Up
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Identifying Xorg video driver in use

The above one liner can be used to determine what card/driver is Xorg currently using. For additional information, see http://goo.gl/mDnWu

echo "tee can split a pipe in two"|tee >(rev) >(tr ' ' '_')

2010-08-14 20:38:59

User: axelabs

Functions: echo tee tr

Tags: tee echo pipe tr pipes rev

Up
Down

Use tee to process a pipe with two or more processes

Tee can be used to split a pipe into multiple streams for one or more process to work it. You can add more " >()" for even more fun.

echo -e "swap=me\n1=2"|sed 's/$.*$=$.*$/\2=\1/g'

2010-01-16 22:01:37

User: axelabs

Functions: echo sed

Tags: bash sed replace

Up
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Sed can refference parts of the pattern in the replacement:

cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getline Clear; printf Clear}{num+=1;printf CursorUp; print num}'

2009-07-13 07:30:51

User: axelabs

Functions: awk cat printf

Tags: nawk awk clear tput

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Watch number of lines being processed on a clear screen

awk can clear the screen while displaying output. This is a handy way of seeing how many lines a tail -f has hit or see how many files find has found. On solaris, you may have to use 'nawk' and your machine needs 'tput'

awk 'BEGIN{srand()}{print rand(),$0}' SOMEFILE | sort -n | cut -d ' ' -f2-

2009-05-29 01:20:50

User: axelabs

Functions: awk cut sort

Tags: sort awk random

Up
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Randomize lines in a file

This appends a random number as a first filed of all lines in SOMEFILE then sorts by the first column and finally cuts of the random numbers.

Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

/usr/proc/bin/pfiles $PID

2009-03-05 17:26:57

User: axelabs

Up
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lsof equivalent on solaris

Report fstat(2) and fcntl(2) information for all open files in each process.

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

echo Print text vertically|sed 's/$.$/\1\n/g'

2009-03-04 23:58:02

User: axelabs

Functions: echo

Tags: sed echo pipe

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Print text string vertically, one character per line.

whois cmd.fu;whois cmdfu.com|grep -i cmdfu

2009-02-19 08:57:50

User: axelabs

Functions: whois

-11

Up
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check if commandlinefu.com got a better domain

It would be nice if commandlinefu.com had a better domain name. Will they pick one of the above; We'll see.