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Commands by depesz

Terminal - Commands by depesz - 37 results

perl -le 'print$_%3?$_%5?$_:"Buzz":$_%5?"Fizz":"FizzBuzz"for 1..100'

2012-01-10 13:10:30

User: depesz

Functions: perl

Tags: perl fizzbuzz

Up
Down

FizzBuzz One-liner

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

ack; pcregrep

2011-08-14 18:01:36

User: depesz

Tags: perl grep regex

Up
Down

Use Perl like grep

Much better alternatives - grep-alikes using perl regexps. With more options, and nicer outputs.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

find public_html/ -type d -exec chmod 755 {} +

2011-07-25 15:25:36

User: depesz

Functions: chmod find

Up
Down

Chmod all directories (excluding files)

+ at the end means that many filenames will be passed to every chmod call, thus making it faster. And find own {} makes sure that it will work with spaces and other characters in filenames.

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lsb_release -ri

2011-06-22 14:03:53

User: depesz

Up
Down

Find Out My Linux Distribution Name and Version

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

find . -depth $ -path '*/*.java.orig' -o -path '*/*.java.orig/*' $ -delete

2011-05-18 16:40:41

User: depesz

Functions: find

-2

Up
Down

Recursively remove all '.java.orig' directories (scalable)

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echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

2011-05-12 14:29:45

User: depesz

Functions: date echo head sort stat

Tags: bash awk stat mtime

-1

Up
Down

Show seconds since modified of newest modified file in directory

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echo "shutdown -h now" | sudo at now + 4 hours

2011-05-02 15:29:48

User: depesz

Functions: at echo sudo

-2

Up
Down

shutdown pc in a 4 hours

Benefit is that it doesn't make you keep the terminal open.

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mkdir copy{1,2}; gzip -dc file.tar.gz | tee >( tar x -C copy1/ ) | tar x -C copy2/

2011-04-14 17:02:05

User: depesz

Functions: gzip mkdir tar tee

Tags: bash tee tar

-1

Up
Down

Extract 2 copies of .tar.gz content

Sometimes you might need to have two copies of data that is in tar. You might unpack, and then copy, but if IO is slow, you might lower it by automatically writing it twice (or more times)

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MyVAR=85 awk '{ print ENVIRON["MyVAR"] }'

2011-04-14 16:46:23

User: depesz

Functions: awk

Tags: bash awk print

Up
Down

BASH: Print shell variable into AWK

Alternatively:

export MyVAR=84; awk '{ print ENVIRON["MyVAR"] }'

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ack hoge .

2011-04-12 17:40:15

User: depesz

-4

Up
Down

grep 'hoge' **/* => Argument list too long

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grep -r hoge .

2011-04-12 17:39:52

User: depesz

Functions: grep

-4

Up
Down

grep 'hoge' **/* => Argument list too long

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find -L . -type l

2011-04-08 07:52:28

User: depesz

Functions: find

Tags: find symlinks

Up
Down

Find broken symlinks

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find . -type d -name .svn -prune -o -type f -print0 | xargs -r0 ...

2011-03-21 21:36:57

User: depesz

Functions: find xargs

Tags: find xargs dotfiles

Up
Down

find files ignoring .svn and its decendents

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

ps -C apache o pid= | sed 's/^/-p /' | xargs strace

2011-03-15 08:46:33

User: depesz

Functions: ps sed xargs

Tags: awk token ps strace tokenizer

-1

Up
Down

easily strace all your apache processes

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dpkg --get-selections | awk '$2=="install" {print $1}' | sort

2011-03-15 08:39:26

User: depesz

Functions: awk

-2

Up
Down

Print sorted list of all installed packages (Debian)

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find . -type f -name '*.pm' -printf '%6s %p\n' | sort -nr | head -n 50

2011-02-09 16:19:11

User: depesz

Functions: find head sort

Up
Down

List 50 largest source files in a project

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.

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ps -o comm= -p $$

2011-02-05 11:54:42

User: depesz

Functions: ps

Up
Down

Figure out what shell you're running

First version was "ps uw -p $$", but current "ps -o comm= -p $$" just gives shell name

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perl -le '$,=".";print map int rand 256,1..4'

2011-01-16 16:57:19

User: depesz

Functions: perl

Up
Down

Random IPv4 address

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perl -le '$,=".";print map int rand 256,1..4'

2011-01-16 16:56:44

User: depesz

Functions: perl

Up
Down

Perl One Liner to Generate a Random IP Address

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perl -le 'print time()'

2011-01-12 16:45:23

User: depesz

Functions: perl

Up
Down

Unix timestamp Solaris

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find -type f -exec du -sh {} + | sort -rh | head

2011-01-04 11:38:29

User: depesz

Functions: du find sort

Tags: size find filesize

-1

Up
Down

Find the biggest files

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find . -type f -size +20000k -print0 | xargs -0 du -h | awk -F"\t" '{printf "%s : %s\n", $2, $1}'

2010-12-15 17:51:09

User: depesz

Functions: awk du find xargs

Up
Down

Find Files over 20Meg

Output made so that it will match initial suggestion for this task. Personally, I think that output of du -h is more readable.

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perl -ane 'print unless $x{$F[0]}++' infile > outfile

2010-12-15 17:46:22

User: depesz

Functions: perl

Up
Down

Remove duplicate rows of an un-sorted file based on a single column

F[0] filters using first word. $F[1] - 2nd, and so on.

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shopt -s globstar; rm -rfv **/.svn

2010-12-15 09:36:43

User: depesz

Functions: rm

Up
Down

Remove all .svn folders

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(netstat -atn | awk '{printf "%s\n%s\n", $4, $4}' | grep -oE '[0-9]*$'; seq 32768 61000) | sort -n | uniq -u | head -n 1

2010-12-15 09:27:59

User: depesz

Functions: awk grep head netstat seq sort uniq

Up
Down

find an unused unprivileged TCP port

perl-less way

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