Commands using cat sorted by votes

Commands using cat (514)

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Show line numbers in a text file
This is sample output - yours may be different.
-6

cat x

umahp44 · 2011-09-15 11:53:47 3
show debian version

work on any debian based GNU/Linux distro Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:~$ cat /etc/debian_version 
squeeze/sid
```
-6

cat /etc/debian_version

eastwind · 2011-12-11 11:13:16 185
Get fresh FollowBack list for Twitter

Go to "https://twitter.com/search/realtime?q=%23TeamFollowBack&src=hash" and then copy al the text on the page. If you scroll down the page will be bigger. Then put al the text in a text file called twit.txt If you follow the user there is a high probability the users give you follow back. To follow all the users you can use an iMacros script.
This is sample output - yours may be different.
-6

for a in $(seq 5 8); do cat twit.txt | cut -d " " -f$a | grep "^@" | sort -u; done > followlst.txt

xmuda · 2013-03-29 21:07:09 5
emptying a file

with this command you can empty file Show Sample Output
This is sample output - yours may be different.
```
cat /dev/null >err.log
```
-8

cat /dev/null >filename

vorphalax · 2009-02-13 10:50:41 22
Display which distro is installed

Found in comments section works on most Linux flavors. Show Sample Output
This is sample output - yours may be different.
```
LSB Version:	core-2.0-noarch:core-3.0-noarch:core-2.0-ia32:core-3.0-ia32:desktop-3.1-ia32:desktop-3.1-noarch:graphics-2.0-ia32:graphics-2.0-noarch:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID:	SUSE LINUX
Description:	SUSE Linux Enterprise Server 10 (i586)
Release:	10
Codename:	n/a
```
-8

test `uname` = Linux && lsb_release -a || ( test `uname` = SunOS && cat /etc/release || uname -rms )

virtualshock · 2009-07-07 20:51:30 60
Creating ISO Images from Audio CD

you should umount /dev/cdrom before using this cli
This is sample output - yours may be different.
-8

cat /dev/scd0 > ~/audio_image.iso

eastwind · 2011-09-24 15:29:27 11
Convert JSON to YAML

Valid JSON is a subset of YAML; no transformation is necessary; however, YAML has many syntax features that are not valid JSON, so you can't do the reverse as easily.
This is sample output - yours may be different.
-8

cat data.json >data.yml

Mozai · 2013-04-25 04:09:58 6
Easily find an old command you run

I know how hard it is to find an old command running through all the files because you couldn't remember for your life what it was. Heres the solution!! Grep the history for it. depending on how old the command you can head or tail or if you wanted to search all because you cannot think how long ago it was then miss out the middle part of the command. This is a very easy and effective way to find that command you are looking for.
This is sample output - yours may be different.
-9

cat .bash_history | tail -100 | grep {command}

techie · 2013-04-10 10:40:52 8
Create a iso from the disk.

Generate the iso from the disk, easily. same as "dd if=/dev/cdrom of=~/mydisk.iso"
This is sample output - yours may be different.
-10

cat /dev/cdrom > ~/mydisk.iso

sata · 2009-03-26 05:54:41 29
gunzip all .gz file in current dir

gunzip all .gz file in current dir
This is sample output - yours may be different.
-10

ls | grep .gz >> list.txt && cat list.txt | while read x ; do gunzip -d $x ; done && rm -rf list.txt

maccu · 2010-11-17 11:06:02 14
What is the sound of your memory ?
This is sample output - yours may be different.
-11

sudo cat /dev/mem > /dev/dsp

eastwind · 2009-04-22 07:26:10 4
display a tab separated file as columns
This is sample output - yours may be different.
-11

cat <file>|column -t

bakhru · 2015-05-30 18:56:34 11
List system's users
This is sample output - yours may be different.
-12

teste.txt < cut -d : -f 1,5 /etc/passwd | tr : \\t | tr a-z A-Z | cat teste.txt

osvaldofilho · 2009-10-20 14:53:38 9
Combining text files into one file
This is sample output - yours may be different.
-16

ls | grep *.txt | while read file; do cat $file >> ./output.txt; done;

octopus · 2010-04-16 13:19:38 6
‹ First < 19 20 21

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Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

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

Switch to the previous branch used in git(1)

Very useful if you keep switching between the same two branches all the time.

Test load balancers

With the "--resolve" switch, you can avoid doing DNS lookups or edit the /etc/hosts file, by providing the IP address for a domain directly. Useful if you have many servers with different IP addresses behind a load balancer. Of course, you would loop it: $ for IP in 10.11.0.{1..10}; do curl --resolve subdomain.example.com:80:$IP subdomain.example.com -I -s; done

Keep from having to adjust your volume constantly

Run this in the directory you store your music in. mp3gain and vorbisgain applies the ReplayGain normalization routine to mp3 and ogg files (respectively) in a reversible way. ReplayGain uses psychoacoustic analysis to make all files sound about the same loudness, so you don't get knocked out of your chair by loud songs after cranking up the volume on quieter ones.

list block devices

Shows all block devices in a tree with descruptions of what they are.

Rename files in batch

Delete all empty lines from a file with vim

If you need to delete lines that may contain space characters (such as tabs or spaces) as well as empty ones, try: $:v/\S/d Just an alternative.

Url Encode

Converts reserved characters in a URI to their percent encoded counterparts. Alternate python version: $ echo "$url" | python -c 'import sys,urllib;print urllib.quote(sys.stdin.read().strip())'

svn diff colorized

If colordiff utility installed, it is sometimes handy to call this command. Of course, you should create an alias for it. E.g. svndiff.

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Commands using cat (514)

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