Commands using grep sorted by votes

Commands using grep (1,935)

sorted by

Read just the IP address of a device

another way to output the IP address' of the system
This is sample output - yours may be different.
-1

/sbin/ifconfig | grep inet | cut -f 2 -d ":" | cut -f 1 -d " "

random_bob · 2009-07-21 21:42:04 10
Read just the IP address of a device

to clean up the extra lines Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
192.168.1.127
```
-1

/sbin/ifconfig | grep inet | cut -f 2 -d ":" | cut -f 1 -d " " |egrep -v "^$"

giray · 2009-07-22 07:27:54 3
Generate CHECK TABLE statements for all MySQL database tables on a server

This command will generate "CHECK TABLE `db_name.table_name` ;" statements for all tables present in databases on a MySQL server, which can be piped into the mysql command. (Can also be altered to perform OPTIMIZE and REPAIR functions.) Tested on MySQL 4.x and 5.x systems in a Linux environment under bash. Show Sample Output
This is sample output - yours may be different.
```
CHECK TABLE `mysql.columns_priv` ;
CHECK TABLE `mysql.db` ;
CHECK TABLE `mysql.func` ;
CHECK TABLE `mysql.help_category` ;
CHECK TABLE `mysql.help_keyword` ;
CHECK TABLE `mysql.help_relation` ;
CHECK TABLE `mysql.help_topic` ;
CHECK TABLE `mysql.host` ;
CHECK TABLE `mysql.tables_priv` ;
CHECK TABLE `mysql.time_zone` ;
CHECK TABLE `mysql.time_zone_leap_second` ;
CHECK TABLE `mysql.time_zone_name` ;
CHECK TABLE `mysql.time_zone_transition` ;
CHECK TABLE `mysql.time_zone_transition_type` ;
CHECK TABLE `mysql.user` ;
CHECK TABLE `mysql.user_info` ;
```
-1

DD=`cat /etc/my.cnf | sed "s/#.*//g;" | grep datadir | tr '=' ' ' | gawk '{print $2;}'` && ( cd $DD ; find . -mindepth 2 | grep -v db\.opt | sed 's/\.\///g; s/\....$//g; s/\//./;' | sort | uniq | tr '/' '.' | gawk '{print "CHECK TABLE","`"$1"`",";";}' )

atcroft · 2009-07-25 03:42:31 15
Get your external IP address
This is sample output - yours may be different.
-1

html2text http://checkip.dyndns.org | grep -i 'Current IP Address:'|cut -c21-36

tkoopa · 2009-08-06 10:29:02 4
Recreate all initrd files

Do this with caution.
This is sample output - yours may be different.
-1

for kern in $(grep "initrd " /boot/grub/grub.conf|grep -v ^#|cut -f 2- -d-|sed -e 's/\.img//g'); do mkinitrd -v -f /boot/initrd-$kern.img $kern; done

oernii2 · 2009-08-19 09:53:29 502
dig this
This is sample output - yours may be different.
-1

for dnsREC in $(curl -s http://www.iana.org/assignments/dns-parameters |grep -Eo ^[A-Z\.]+\ |sed 's/TYPE//'); do echo -n "$dnsREC " && dig +short $dnsREC IANA.ORG; done

commandlinefu · 2009-09-01 03:11:18 3
How far is Mac OS X 10.6 from 64-bit?

Next time you see a mac fanboy bragging about 64-bitness of 10.6 give him this so he might sh? Show Sample Output
This is sample output - yours may be different.
```
   127	Mach-O 64-bit kext bundle x86_64
   314	Mach-O object i386
```
-1

file /System/Library/Extensions/*.kext/Contents/MacOS/* |grep -i x86_64 |nl |tail -1 |cut -f1 -f3 && file /System/Library/Extensions/*.kext/Contents/MacOS/* |grep -v x86_64 |nl |tail -1 |cut -f1 -f3

commandlinefu · 2009-09-03 14:28:02 6
Edit all files found having a specific string found by grep

needs no GNU tools, as far as I see it
This is sample output - yours may be different.
-1

find . -exec grep foobar /dev/null {} \; | awk -F: '{print $1}' | xargs vi

verboEse · 2009-09-03 16:02:18 3
Edit all files found having a specific string found by grep

Make sure that find does not touch anything other than regular files, and handles non-standard characters in filenames while passing to xargs.
This is sample output - yours may be different.
-1

find . -type f -exec grep -qi 'foo' {} \; -print0 | xargs -0 vim

arcege · 2009-09-03 17:55:26 7
Show apps that use internet connection at the moment.

Can be used to discover what programms create internet traffic. Skip the part after awk to get more details. Has anyone an idea why the uniq doesn't work propperly here (see sample output)? Show Sample Output
This is sample output - yours may be different.
```
java          
pidgin         
pidgin         
pidgin         
pidgin         
pidgin         
thunderbird-b 
thunderbird-b 
thunderbird-b 
thunderbird-b 
```
-1

netstat -lantp | grep -i establ | awk -F/ '{print $2}' | uniq | sort

ktoso · 2009-09-19 13:54:36 7
get Hong Kong weather infomation from HK Observatory

From Hong Kong Observatory wap site ;) Show Sample Output
This is sample output - yours may be different.
```
HK Observatory
At 10 AM
29'C,75%
UV Index: 4
```
-1

wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | grep -v '^$'

twfcc · 2009-09-25 02:21:05 6
List only the directories

No need for -l and the output can be sent directly into another function expecting directory names. Show Sample Output
This is sample output - yours may be different.
```
pub/
workspace/
```
-1

ls -F|grep /

romulusnr · 2009-10-08 16:35:15 4
Grep for a TAB

Grep for a TAB . -- www.fir3net.com --
This is sample output - yours may be different.
-1

grep $'\t' file.txt

felix001 · 2009-10-08 23:14:14 3
Count emails in an MBOX file
This is sample output - yours may be different.
-1

grep -c '^From ' mbox_file

drewk · 2009-11-07 03:31:05 4
kalarm 1 per minute simplest e-mail beacom for Geovision surveillance DVR

I have a custmer's Geovision DVR installed on a closed proxi (only logme-in reaches it). I have to check for reliability but logmein hangs and is too slow a process I made the Geovision software send e-mail every minute to the www.spam.la site. All this script does is to retrieve the e-mail header from spam.la ( no login!), filtering sender, stopping at the first occurrence of the word "secs" ( the age of the last e-mail ). The result is the age of the sender's last e-mail, tiny published on top of my screen once a minute. I can refresh www.spam.la via web browser, but have other things to do. I use it inside Kalarm ( kde task schedule ) set to 1 minute repeat. It can be done without kalarm, using Watch outside the script. Try it out now using my account = geo1 ( change sender by geo1 in this script) Needs curl , osd-bin
This is sample output - yours may be different.
-1

curl http://www.spam.la/?f=sender | grep secs| awk '{print; exit}' | osd_cat -i 40 -d 30 -l 2

m33600 · 2009-11-12 21:33:06 5
Find iPod's fwguid

This is a bit of a hack, but it will get your fwguid which is needed sometimes when using your iPod. Show Sample Output
This is sample output - yours may be different.
```
000A27001BB1BE3F
```
-1

lsusb -v | grep -o "[0-9A-Z]{16}"

matthewbauer · 2009-11-22 00:58:00 4
List files that DO NOT match a pattern
This is sample output - yours may be different.
-1

ls | grep -vi pattern

haivu · 2009-11-24 20:39:53 5
View the newest xkcd comic.

Same thing just a different way to get there. You will need lynx
This is sample output - yours may be different.
-1

lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e 's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

solarislackware · 2009-12-03 18:53:57 3
Show Network IP and Subnet

same thing as the other
This is sample output - yours may be different.
-1

ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\//g') | awk '/Network/ { print $2 } '

solarislackware · 2009-12-05 15:00:32 3
prints line numbers
This is sample output - yours may be different.
-1

grep -n . datafile ;

glaudiston · 2009-12-08 15:41:22 3
show your locale language keyboard setting

Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:~$ locale | grep LANG=
LANG=fr_BE.UTF-8
```
-1

locale | grep LANG=

eastwind · 2009-12-10 07:24:01 5
Find and print pattern location from all files on command line from directory and its sub directories.

The command will help to print the location of the pattern. Above command will print all the files which contain variable "$foo" along with line containing that pattern. Specify pattern after "grep"
This is sample output - yours may be different.
-1

find . -exec grep $foo {} \; -print

linuxgeek · 2009-12-30 17:41:44 4
[Gentoo] Input modules, commented, in your module.autoload file

Whenever you compile a new kernel, there are always new modules. The best way to make sure you have the correct modules loaded when you boot is to add all your modules in the modules.autoload file (they will be commented) and uncomment all those modules you need. Also a good way to keep track of the available modules in your system. For other distros you may have to change the name of the file to /etc/modprobe.conf Show Sample Output
This is sample output - yours may be different.
```
# /etc/modules.autoload.d/kernel-2.6:  kernel modules to load when system boots.
#
# Note that this file is for 2.6 kernels.
#
# Add the names of modules that you'd like to load when the system
# starts into this file, one per line.  Comments begin with # and
# are ignored.  Read man modules.autoload for additional details.

# For example:
# aic7xxx
# mixer-oss.ko
# pcm-oss.ko
# seq-device.ko
# seq-oss.ko
# snd-seq.ko
```
-1

find /lib/modules/`uname -r`/ -type f -iname '*.o' -or -iname '*.ko' |grep -i -o '[a-z0-9]*[-|_]*[0-9a-z]*\.ko$' |xargs -I {} echo '# {}' >>/etc/modules.autoload.d/kernel-2.6

paragao · 2010-01-13 02:12:08 4
Find all files containing a word

This is very similar to the first example except that it employs the 'exec' argument of the find command rather than piping the result to xargs. The second example is nice and tidy but different *NIXs may not have as capable a grep command.
This is sample output - yours may be different.
-1

find . -name "*.php" -exec grep -il searchphrase {} \;

unixmonkey7797 · 2010-01-16 05:09:30 4
Recursively search a directory tree for all .php .inc .html .htm .css .js files for a certain string

Use find to recursively make a list of all files from the current directory and downwards. The files have to have an extension of the ones listed. Then for every file found, grep it for 'searchString', returns the filename if searchString is found. Show Sample Output
This is sample output - yours may be different.
```
./index.html
./lib/php/buttons.php
```
-1

find . -type f $ -name "*.js" -o -name "*.php" -o -name "*.inc" -o -name "*.html" -o -name "*.htm" -o -name "*.css" $ -exec grep -il 'searchString' {} \;

niels_bom · 2010-02-07 15:28:20 3
‹ First < 61 62 63 64 65 > Last ›

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.

Share Your Commands

Check These Out

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Insert a comment on command line for reminder

Comments can be used directly on the command line so I can save in the history a brief description of what command does.

display a smiling smiley if the command succeeded and a sad smiley if the command failed

you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

Find the package that installed a command

foo <--> german translation with dict.leo.org

Translate strings from non-german to german (and vice versa) using LEO. Put it in your ~/.bashrc. Usage: $ leo words To use another language other than english, use an option: $ leo -xx words Valid language options: ch - chinese en - english es - spanish fr - french it - italian pl - polish pt - portuguese ru - russian The other language will always be german!

back ssh from firewalled hosts

host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

how to find the active X (X11/xorg) username and DISPLAY variable

Requires consolekit (works in e.g. Ubuntu). Here x11-display is DISPLAY

Do a search-and-replace in a file after making a backup

sed already has an option for editing files in place and making backup copies of the old file. -i will edit a file in place and if you give it an argument, it will make a backup file using that string as an extension.

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

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" }

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using grep

Commands using grep (1,935) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using grep (1,935)

sorted by