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 66
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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Display IP adress of the given interface in a most portable and reliable way. That should works on many platforms.

Thanks to comment if that works or not... If you have already typed that snippet or you know you already have IO::Interface::Simple perl module, you can type only the last command : $ perl -e 'use IO::Interface::Simple; my $ip=IO::Interface::Simple->new($ARGV[0]); print $ip->address,$/;' ( The first perl command will install the module if it's not there already... )

Look at your data as a greymap image.

Keep width to a power of 2 to see patterns emerge. 512 is good. So is 4096 for huge maps. PNM headers are super basic. http://netpbm.sourceforge.net/doc/pbm.html

Increase SCT of external USB disk enclosure to one hour.

So I had this 2TB Seagate external disk/USB enclosure which by default would spin-down its internal drive (it enters a standby mode) after four minutes of inactivity.. Spinning-up the inactive drive was an annoying delay when accessing files and also it severely interfered with NFS.. SCT stands for "Standby Condition Timer". To completely disable SCT: $ sdparm --clear STANDBY -6 /dev/sdb To return to original (default) SCT settings: $ sdparm -D -p 0x1a -6 /dev/sdb To verify the settings (before and after): $ sdparm -a /dev/sdb No need for vendor-provided MSWIN tools, etc.

Comment out a line in a file

This will comment out a line, specified by line number, in a given file.

Exclude svn directories with grep

exclude-dir option requires grep 2.5.3

Quickly analyse an Apache error log

This searches the Apache error_log for each of the 5 most significant Apache error levels, if any are found the date is then cut from the output in order to sort then print the most common occurrence of each error.

Output files without comments or empty lines

Filter comments and empty lines in files. I find this very useful when trying to find what values are actually set in a very long example config file. I often set an alias for it, like : alias nocomment='grep -v "^$$\|#$"'

list files recursively by size

awk date convert

Convert readable date/time with `date` command

Show a passive popup in KDE

Display a passive popup during seconds. Additionnaly, --title can be used to set the title of the popup. This is a nice way to communicate with a desktop user of a machine you have an SSH access on : DISPLAY=:0 sudo -u $user -H kdialog --passivepopup "Hello you" 10 --title "cli IM"

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Commands using cat (514)

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