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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 08:25:00 309
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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bash/ksh function: given a file, cd to the directory it lives

fcd : file change directory A bash function that takes a fully qualified file path and cd's into the directory where it lives. Useful on the commadline when you have a file name in a variable and you'd like to cd to the directory to RCS check it in or look at other files associated with it. Will run on any ksh, bash, likely sh, maybe zsh.

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

whowatch: Linux and UNIX interactive, process and users monitoring tool

whowatch is a interactive, ncurses-based, process and users monitoring tool, which updates information in real time. This is a perfect tool for local and remote servers. It displays information about the users currently logged on to the machine, in real-time. Besides standard information (login name, tty, host, user's process), the type of the connection (ie. telnet or ssh) is shown. Display of users command line can be switch to tty idle time. Certain user can be selected and his processes tree may be viewed as well as tree of all system processes. Tree may be displayed with additional column that shows owner of each process. In the process tree mode SIGINT and SIGKILL signals can be sent to the selected process. Killing processes is just as simple and fun as deleting lines on the screen.

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

Speak & Spell-esque glitch sounds

The Speak & Spell's sound chip uses a compressed audio format called "linear predictive coding". This command will read random bytes and attempt to decompress them as if it were audio data compressed in this format, then play it. This results in a unique sound which is similar to a glitching Speak & Spell.

Explanation of system and MySQL error codes

perror should be installed if mysql-server package is installed

Combine two mp3's or more into 1 long mp3

This just combines multiple mp3's into one mp3 file. Basically it is a easy join for mp3's

Recursive replace of directory and file names in the current directory.

This should work anywhere perl and grep is available. :P

Generate RSA private key and self-signed certificate

This will create, in the current directory, a file called 'pk.pem' containing an unencrypted 2048-bit RSA private key and a file called 'cert.pem' containing a certificate signed by 'pk.pem'. The private key file will have mode 600. !!ATTENTION!! ==> this command will overwrite both files if present.

List open files that have no links to them on the filesystem

I have come across a situation in the past where someone has unlinked a file by running an 'rm' command against it while it was still being written to by a running process. The problem manifested itself when a 'df' command showed a filesystem at 100%, but this did not match the total value of a 'du -sk *'. When this happens, the process continues to write to the file but you can no longer see the file on the filesystem. Stopping and starting the process will, more often than not, get rid of the unlinked file, however this is not always possible on a live server. When you are in this situation you can use the 'lsof' command above to get the PID of the process that owns the file (in the sample output this is 23521). Run the following command to see a sym-link to the file (marked as deleted): $ cd /proc/23521/fd && ls -l Truncate the sym-link to regain your disk space: $ > /proc/23521/fd/3 I should point out that this is pretty brutal and *could* potentially destabilise your system depending on what process the file belongs to that you are truncating.

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