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Delete all lines after the first match
This is sample output - yours may be different.
0

sed -n -e '1,/match/p'

climatewarrior · 2009-06-03 16:33:43 6
Find chronological errors or bad timestamps in a Subversion repository

Lists revisions in a Subversion repository with a timestamp that doesn't follow the revision numbering order. If everything is OK, nothing is displayed.
This is sample output - yours may be different.
2

URL=http://svn.example.org/project; diff -u <(TZ=UTC svn -q log -r1:HEAD $URL | grep \|) <(TZ=UTC svn log -q $URL | grep \| | sort -k3 -t \|)

sunny256 · 2009-06-03 14:26:55 4
See smbstatus all the time

See smbstatus Output within a 5 second interval (for monitoring smb access)
This is sample output - yours may be different.
-4

while (( $i != 0 )) { smbstatus; sleep 5; clear }

unixmonkey4084 · 2009-06-03 13:26:30 9
Monitor logs in Linux using Tail

Works in Ubuntu, I hope it will work on all Linux machines. For Unixes, tail should be capable of handling more than one file with '-f' option. This command line simply take log files which are text files, and not ending with a number, and it will continuously monitor those files. Putting one alias in .profile will be more useful.
This is sample output - yours may be different.
6

find /var/log -type f -exec file {} \; | grep 'text' | cut -d' ' -f1 | sed -e's/:$//g' | grep -v '[0-9]$' | xargs tail -f

mohan43u · 2009-06-03 09:47:08 11
Show git branches by date - useful for showing active branches

Print out list of all branches with last commit date to the branch, including relative time since commit and color coding. Show Sample Output
This is sample output - yours may be different.
```
2009-06-03 12:21:35 +0900 3 hours ago	add_cool_functionality
2009-06-02 16:15:13 +0900 24 hours ago	remove_strange_bug
2009-06-02 16:12:20 +0900 24 hours ago	implement_observer
2009-06-02 14:42:58 +0900 25 hours ago	experiment_with_bobcat_feature
```
16

for k in `git branch|perl -pe s/^..//`;do echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k|head -n 1`\\t$k;done|sort -r

brunost · 2009-06-03 08:25:00 318
coloured tail

tail with coloured output with the help of perl - need more colours? here is a colour table: http://www.tuxify.de/?p=23 Show Sample Output
This is sample output - yours may be different.
```
well no colours here
```
17

tail -f FILE | perl -pe 's/KEYWORD/\e[1;31;43m$&\e[0m/g'

tuxifier · 2009-06-02 21:31:54 22
du disk top 10

fancy command line ncdu clone Show Sample Output
This is sample output - yours may be different.
```
67 MB used by /var/log
42 MB used by /var/log/gdm
9 MB used by /var/log/ConsoleKit
2 MB used by /var/log/munin
1 MB used by /var/log/kismet
1 MB used by /var/log/dist-upgrade
0 MB used by /var/log/apache2
0 MB used by /var/log/installer
0 MB used by /var/log/vmware
0 MB used by /var/log/cups
```
7

for i in `du --max-depth=1 $HOME | sort -n -r | awk '{print $1 ":" $2}'`; do size=`echo $i | awk -F: '{print $1}'`; dir=`echo $i | awk -F: '{print $NF}'`; size2=$(($size/1024)); echo "$size2 MB used by $dir"; done | head -n 10

tuxifier · 2009-06-02 21:27:48 8
Check version of DNS Server

Show Sample Output
This is sample output - yours may be different.
```
maggie:~ root# nslookup -q=txt -class=CHAOS version.bind NS.PHX5.NEARLYFREESPEECH.NET
Server:		NS.PHX5.NEARLYFREESPEECH.NET
Address:	208.94.116.129#53
version.bind	text = "9.3.4-P1"
```
0

nslookup -q=txt -class=CHAOS version.bind NS.PHX5.NEARLYFREESPEECH.NET

unixmonkey4063 · 2009-06-02 19:54:24 5
Archive every file in /var/logs
This is sample output - yours may be different.
0

find /var/logs -name * | xargs tar -jcpf logs_`date +%Y-%m-%e`.tar.bz2

unixmonkey4063 · 2009-06-02 19:48:47 6
Search for all files that begin with . and delete them.

Show Sample Output
This is sample output - yours may be different.
```
maggie:~ root# find ~/Desktop/ $ -regex '.*/\..*' $ -print -exec rm -Rf {} \;
~/Desktop/.DS_Store
~/Desktop/.fseventsd
```
-6

find ~/Desktop/ $ -regex '.*/\..*' $ -print -exec rm -Rf {} \;

unixmonkey4063 · 2009-06-02 19:45:06 8
Uncompress a CSS file

Ever compress a file for the web by replacing all newline characters with nothing so it makes one nice big blob? It is a great idea, however what about when you want to edit that file? ...Serious pain in the butt. I ran into this today in that my only copy of a CSS file was "compressed" with no newlines. I whipped this up and it converted back into nice human readable CSS :-) It could be nicer, but it does the job.
This is sample output - yours may be different.
1

cat somefile.css | awk '{gsub(/{|}|;/,"&\n"); print}' >> uncompressed.css

lrvick · 2009-06-02 15:51:51 37
resolve hostname to IP our vice versa with less output

inverted version: resolveip -s 216.34.181.xxx freshmeat.net Show Sample Output
This is sample output - yours may be different.
```
root@zappa:~/Music# resolveip -s www.freshmeat.net
216.34.181.xxx
```
1

resolveip -s www.freshmeat.net

ncaio · 2009-06-02 14:25:53 7
print random commandlinefu.com submission

ok I'm sure it's not pretty Show Sample Output
This is sample output - yours may be different.
```
Terminal - runs a bash script in debugging mode    
bash -x ./post_to_commandlinefu.sh
```
-2

lynx -source http://www.commandlinefu.com/commands/random | sed 's/<[^>]*>//g' | head -1037 | tail -10 | sed -e 's/^[ \t]*//' | sed '/^$/d' | head -2

lxtips · 2009-06-02 09:48:59 11
Get yesterday's date or a previous time

With this command you can get a previous or future date or time. Where can you use this? How about finding all files modified or created in the last 5 mins? touch -t `echo $(date -d "5 minute ago" "+%G%m%d%H%M.%S")` me && find . -type f -newer me List all directories created since last week? touch -t `echo $(date -d "1 week ago" "+%G%m%d%H%M.%S")` me && find . -type d -cnewer me I'm sure you can think of more ways to use it. Requires coreutils package. Show Sample Output
This is sample output - yours may be different.
```
Sun May 31 18:36:28 MYT 2009
Mon Jun  1 07:36:28 MYT 2009
Mon Jun  1 16:33:28 MYT 2009
Tue Jun  2 10:36:28 MYT 2009
```
5

date -d '1 day ago'; date -d '11 hour ago'; date -d '2 hour ago - 3 minute'; date -d '16 hour'

LrdShaper · 2009-06-01 10:41:56 9
Remove all mail in Postfix mail queue.
This is sample output - yours may be different.
2

postsuper -d ALL

virtualshock · 2009-05-31 23:47:02 4
Check wireless link quality with dialog box

The variable WIRELESSINTERFACE indicates your wireless interface
This is sample output - yours may be different.
1

while [ i != 0 ]; do sleep 1 | dialog --clear --gauge "Quality: " 0 0 $(cat /proc/net/wireless | grep $WIRELESSINTERFACE | awk '{print $3}' | tr -d "."); done

ncaio · 2009-05-31 16:09:23 12
Get pages number of the pdf file
This is sample output - yours may be different.
7

pdfinfo Virtualization_A_Beginner_Guide.pdf | awk /Pages/

ncaio · 2009-05-31 15:45:38 7
Mount a CD-ROM on Solaris (SPARC)

This will allow you to mount a CD-ROM on Solaris SPARC 9 or lower. This will not work on Solaris 10 due to void and the volume management daemons. www.fir3net.com
This is sample output - yours may be different.
-2

mkdir -p /cdrom/unnamed_cdrom ; mount -F hsfs -o ro `ls -al /dev/sr* |awk '{print "/dev/" $11}'` /cdrom/unnamed_cdrom

felix001 · 2009-05-31 08:42:20 5
Scrollable Colorized Long Listing - Hidden Files Sorted Last

To sort hidden files first, simply switch the two inner `ls` commands. I have this aliased to `dira` `dir` is aliased to the simpler version with no hidden files: ls -l --color=always | less -R
This is sample output - yours may be different.
2

less -Rf <( cat <(ls -l --color=always) <(ls -ld --color=always .*) )

asmoore82 · 2009-05-30 23:51:16 9
unzip all zip files under a current directory in the directory those files were in

unzips all zip files in any subdirectory under the current directory. The zip files are unzipped in their respective subdirs
This is sample output - yours may be different.
-3

for f in `find ./ -name "*.zip"` ; do p=`pwd`; d=`dirname $f`; cd $d; b=`basename $f`; unzip $b; cd $p; done

packetloss · 2009-05-30 03:42:53 10
Check syntax of all PHP files before an SVN commit

Really only valuable in a PHP-only project directory. This is using standard linux versions of the tools. On most older BSD variants of sed, use -E instead of -r. Or use: sed 's/\+[[:space:]]\{1,\}//' instead. Show Sample Output
This is sample output - yours may be different.
```
No syntax errors detected in blah/crap.php
No syntax errors detected in thing/stuff.php
PHP Warning:  Unterminated comment starting line 38 in otherthing/include/bootstrap.php on line 38
```
0

for i in `svn status | egrep '^(M|A)' | sed -r 's/\+\s+//' | awk '{ print $2 }'` ; do if [ ! -d $i ] ; then php -l $i ; fi ; done

brephophagist · 2009-05-29 23:59:28 5
Backup sda5 partition to ftp ( using pipes and gziped backup )
This is sample output - yours may be different.
7

dd if=/dev/sda5 bs=2048 conv=noerror,sync | gzip -fc | lftp -u user,passwd domain.tld -e "put /dev/stdin -o backup-$(date +%Y%m%d%H%M).gz; quit"

sputnick · 2009-05-29 21:56:32 5
Show display type
This is sample output - yours may be different.
-1

ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6

unixmonkey4003 · 2009-05-29 18:52:12 4
Remove an old gmetric statistic

The -d flag sets the lifetime of a metric and defaults to 0 hence why old metrics continue to be graphed in the dashboard. Submitting a dummy value and short lifetime ensures that the metric is removed from the dashboard.
This is sample output - yours may be different.
-1

gmetric -n $METRIC_NAME -v foo -t string -d 10

root · 2009-05-29 14:21:24 7
view solaris system logs

read system logs of sun solaris 9
This is sample output - yours may be different.
-10

more /var/adm/messages

miccaman · 2009-05-29 12:10:18 19
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What's this?

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Search recursively to find a word or phrase in certain file types, such as C code

ack search recursively by default

Update zone file Serial numbers

Will edit *.db files in the same directory with todays date. Useful for doing a mass update to domains on a nameserver, adding spf records, etc. Looks for a string starting with 200 or 201 followed by 7 numbers, and replaces with todays date. This won't overwrite Ip's but i would still do some double checking after running this. Make sure your server's date is correct, otherwise insert your own serial number. $rndc reload should usually follow this command.

Translates a phrase from English to Portuguese

Translates a string from English to Portuguese by using google translator web service.

Create test images

Useful to test programs and webpages.

Quick and Temporary Named Commands

* Add comment with # in your command * Later you can search that command on that comment with CTRL+R In the title command, you could search it later by invoking the command search tool by first typing CTRL+R and then typing "revert"

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Unlock more space form your hard drive

This command changes the reserved space for privileged process on '/dev/sda' to 1 per cent.

Rename files in batch

Print every Nth line

Sometimes commands give you too much feedback. Perhaps 1/100th might be enough. If so, every() is for you. $ my_verbose_command | every 100 will print every 100th line of output. Specifically, it will print lines 100, 200, 300, etc If you use a negative argument it will print the *first* of a block, $ my_verbose_command | every -100 It will print lines 1, 101, 201, 301, etc The function wraps up this useful sed snippet: $ ... | sed -n '0~100p' don't print anything by default $ sed -n starting at line 0, then every hundred lines ( ~100 ) print. $ '0~100p' There's also some bash magic to test if the number is negative: we want character 0, length 1, of variable N. $ ${N:0:1} If it *is* negative, strip off the first character ${N:1} is character 1 onwards (second actual character).

delete a particular line by line number in file

deletes line 3 in known_hosts text file

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