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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 08:25:00 316
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?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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The Hidden PS

While going through the source code for the well known ps command, I read about some interesting things.. Namely, that there are a bunch of different fields that ps can try and enumerate for you. These are fields I was not able to find in the man pages, documentation, only in the source. Here is a longer function that goes through each of the formats recognized by the ps on your machine, executes it, and then prompts you whether you would like to add it or not. Adding it simply adds it to an array that is then printed when you ctrl-c or at the end of the function run. This lets you save your favorite ones and then see the command to put in your .bash_profile like mine at : http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Note that I had to do the exec method below in order to pause with read. t () { local r l a P f=/tmp/ps c='command ps wwo pid:6,user:8,vsize:8,comm:20' IFS=' '; trap 'exec 66

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Colour part of your prompt red to indicate an error

If the return code from the last command was greater than zero, colour part of your prompt red. The commands give a prompt like this: [user current_directory]$ After an error, the "[user" part is automatically coloured red. Tested using bash on xterm and terminal. Place in your .bashrc or .bash_profile.

Multiplication table

The multiplication table for math study

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

merge pdf using bash brace exansion

merge pdf from pg_0001.pdf until pg_0009.pdf into MyFile.pdf

Validating a file with checksum

Find the package that installed a command

List complete size of directories (do not consider hidden directories)

why make it complicated ? : ] -------------------- I just noticed someone else has posted this on this site before me (sorry I am now a duplicate :/) http://www.commandlinefu.com/commands/view/4313

See how many more processes are allowed, awesome!

There is a limit to how many processes you can run at the same time for each user, especially with web hosts. If the maximum # of processes for your user is 200, then the following sets OPTIMUM_P to 100. $ OPTIMUM_P=$(( (`ulimit -u` - `find /proc -maxdepth 1 $ -user $USER -o -group $GROUPNAME $ -type d|wc -l`) / 2 )) This is very useful in scripts because this is such a fast low-resource-intensive (compared to ps, who, lsof, etc) way to determine how many processes are currently running for whichever user. The number of currently running processes is subtracted from the high limit setup for the account (see limits.conf, pam, initscript). An easy to understand example- this searches the current directory for shell scripts, and runs up to 100 'file' commands at the same time, greatly speeding up the command. $ find . -type f | xargs -P $OPTIMUM_P -iFNAME file FNAME | sed -n '/shell script text/p' I am using it in my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html especially for the xargs command. Xargs has a -P option that lets you specify how many processes to run at the same time. For instance if you have 1000 urls in a text file and wanted to download all of them fast with curl, you could download 100 at a time (check ps output on a separate [pt]ty for proof) like this: $ cat url-list.txt | xargs -I '{}' -P $OPTIMUM_P curl -O '{}' I like to do things as fast as possible on my servers. I have several types of servers and hosting environments, some with very restrictive jail shells with 20processes limit, some with 200, some with 8000, so for the jailed shells my xargs -P10 would kill my shell or dump core. Using the above I can set the -P value dynamically, so xargs always works, like this. $ cat url-list.txt | xargs -I '{}' -P $OPTIMUM_P curl -O '{}' If you were building a process-killer (very common for cheap hosting) this would also be handy. Note that if you are only allowed 20 or so processes, you should just use -P1 with xargs.

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