Commands using cat sorted by votes

Commands using cat (514)

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Get Total Line Count Of All Files In Subdirectory (Recursive)
This is sample output - yours may be different.
0

find . -type f -name "*.*" -exec cat {} > totalLines 2> /dev/null \; && wc -l totalLines && rm totalLines

philwc · 2012-03-22 13:11:53 3
pdfappend: append multiple pdf files
This is sample output - yours may be different.
0

pdftk 1.pdf 2.pdf cat output 12.pdf

bossNova · 2012-03-28 15:38:34 3
pdftk append with handles
This is sample output - yours may be different.
0

pdftk A=1.pdf B=2.pdf C=3.pdf cat C A output CA.pdf

bossNova · 2012-03-28 15:41:44 22
insert blank lines
This is sample output - yours may be different.
0

sed G input.txt | cat -s

kev · 2012-04-07 02:15:18 5
watch iptables counters

this alternative shows the differences as they occur so that they are made plain Show Sample Output
This is sample output - yours may be different.
```
@@ -28 +28 @@
-  339 27684 zone_lan_forward  all  --  br-lan *       0.0.0.0/0            0.0.0.0/0           
+  340 27768 zone_lan_forward  all  --  br-lan *       0.0.0.0/0            0.0.0.0/0           
```
0

while true; do iptables -nvL > /tmp/now; diff -U0 /tmp/prev /tmp/now > /tmp/diff; clear; cat /tmp/diff; mv /tmp/now /tmp/prev; slee p 1; done

unixmonkey34223 · 2012-04-15 00:02:33 3
Suppress standard output using > /dev/null

This will be very helpful when you are debugging shell scripts, where you don?t want to display the echo statement and interested in only looking at the error messages. Similarly use 2> to supress error messages Show Sample Output
This is sample output - yours may be different.
```
Error messages only
```
0

cat file.txt > /dev/null

ankush108 · 2012-06-26 18:34:12 3
top ten shell command in bash shell
This is sample output - yours may be different.
0

cat ~/.bash_history | perl -lane 'if($F[0] eq "sudo"){$hash{$F[1]}++}else{$hash{$F[0]}++};$all++;END {@top = map {[$_, $hash{$_}]} sort {$hash{$b}<=>$hash{$a}} keys %hash;printf("%10s%10d%10.2f%%\n", $_->[0],$_->[1],$_->[1]/$all*100) for @top[0..9]}'

vinian · 2012-07-02 09:38:06 7
Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

chmod authorized_keys so you don't get "Authentication refused: bad ownership or modes for file /home/user/.ssh/authorized_keys"
This is sample output - yours may be different.
0

cat ~/.ssh/id_rsa.pub | ssh tester@10.2.6.10 "mkdir -p ~/.ssh; cat >> ~/.ssh/authorized_keys; chmod 600 ~/.ssh/authorized_keys"

unixmonkey37839 · 2012-07-18 04:41:54 12
Copy your ssh public key to a server from a machine that doesn't have ssh-copy-id

chmod authorized_keys so you don't get "Authentication refused: bad ownership or modes for file /home/user/.ssh/authorized_keys"
This is sample output - yours may be different.
0

cat ~/.ssh/id_rsa.pub | ssh tester@10.2.6.10 "mkdir -p ~/.ssh; cat >> ~/.ssh/authorized_keys; chmod 600 ~/.ssh/authorized_keys"

unixmonkey37839 · 2012-07-18 04:41:55 6
Extract URLs from all anchors inside an HTML document with sed and grep

Extract all href links from an HTML document with sed and grep Show Sample Output
This is sample output - yours may be different.
```
#
./index.html
./index2.html
http://www.google.com
./ipl.html
```
0

cat index.html | grep -o '<a .*href=.*>' | sed -e 's/<a /\n<a /g' | sed -e 's/<a .*href=['"'"'"]//' -e 's/["'"'"'].*$//' -e '/^$/ d'

crisboot · 2012-08-06 10:31:38 7
convert unixtime to human-readable

works where perl works, because the awk version is gnu awk only. Show Sample Output
This is sample output - yours may be different.
```
[12-09-19 00:29:33] ...
```
0

cat log | perl -ne 'use POSIX; s/([\d.]+)/strftime "%y-%m-%d %H:%M:%S", localtime $1/e,print if /./'

bs · 2012-09-19 06:38:31 4
find git commits by description

Given a file with the format of 'git log --pretty=short', search in last 100 commits for one with the same description. I used this when after a rebase I had to find out the new commit ids. The second sed replaces all special characters with dots so they don't mess up the grep later on. Show Sample Output
This is sample output - yours may be different.
```
0dd4c64aa728a398d2c579868a3f0191f5d3b4fa write some awesome feature
9a26d4a9a2e37a68dbf21619ef03b58017a42f2f fix a nasty bug
04dcc29359e95e5b944d634cff307605f7c573df write another cool feature
```
0

cat /tmp/commit_list | { while read old_commit ; do msg="`git log --pretty=oneline $old_commit'^'..$old_commit | sed 's/[0-9a-f]* //' | sed 's/[^A-Za-z0-9]/./g'`"; git log --pretty=oneline HEAD@'{100}'..HEAD | grep "$msg" ; done ; }

plexus · 2012-10-11 11:06:40 4
neat diff of remote files owned by root on different systems
This is sample output - yours may be different.
0

diff -u <(ssh -t user@host1 sudo cat /dir1/file1) <(ssh -t user@host2 sudo cat /dir2/file2)

moosaka · 2012-11-09 09:12:56 4
Convert metasploit cachedump files to Hashcat format for cracking
This is sample output - yours may be different.
0

cd ~/.msf4/loot && cat *mscache* | cut -d '"' -f 2,4 | sed s/\"/\:/g | tr -cd '\11\12\40-\176' | grep -v Username | cut -d : -f 1,2 | awk -F':' '{print $2,$1}' | sed 's/ /:/g' > final.dcc.hash

purehate · 2012-11-26 02:10:08 6
Monitor file contents that is being overwritten regularly

Watch file's contents that is getting overwritten Show Sample Output
This is sample output - yours may be different.
```
File contents
Which is beings updated every second
```
0

while sleep 1; do clear; cat /tmp/whatever.cue; done

sergeylukin · 2012-11-26 08:02:03 6
Copy file to multiple destinations
This is sample output - yours may be different.
0

cat myfile | tee dest1 dest2 > /dev/null 2>&1

sergeylukin · 2012-11-28 09:51:25 4
Create a tar archive from a text list without trailing slash in directories
This is sample output - yours may be different.
0

cat list.txt | pax -wd > archive.tar

bugmenot · 2013-01-02 17:53:52 4
Convert metasploit cachedump files to Hashcat format for cracking

Convert Metasploit?s MSCACHE output to Hashcat version (performed in ~/.msf4/loot/):
This is sample output - yours may be different.
0

cat *mscache* | awk -F '"' '{print $4":"$2}'

mubix · 2013-01-06 06:54:57 13
The letter your commands most often start with

Kind of fun if you're that was inclined. I figured most of my commands start with s. sudo, screen, ssh etc. This script tells me what else they start with. Show Sample Output
This is sample output - yours may be different.
```
685 s
255 g
251 c
193 l
130 p
83 n
81 m
70 r
56 d
24 u
23 a
22 t
14 i
14 h
13 f
11 o
7 e
4 w
4 v
4 j
3 k
3 b
1 x
0 z
0 y
0 q
```
0

for i in {a..z}; do echo $(cat ~/.bash_history | grep ^$i.* | wc -l) $i; done | sort -n -r

yaMatt · 2013-01-23 18:59:13 4
Instant threadpool
This is sample output - yours may be different.
0

cat item_list | xargs -n1 -P<n> process_item

sanchan89 · 2013-03-06 20:25:17 33
Verify a file has not been tampered with since dpkg installation

Replace "user/sbin/sshd" with the file you would like to check. If you are doing this due to intrusion, you obviously would want to check size, last modification date and md5 of the md5sum application itself. Also, note that "/var/lib/dpkg/info/*.md5sums" files might have been tampered with themselves. Neither to say, this is a useful command. Show Sample Output
This is sample output - yours may be different.
```
/usr/sbin/sshd: OK
```
0

cat /var/lib/dpkg/info/*.md5sums|grep usr/sbin/sshd|sed 's,usr,/usr,'|md5sum -c

Ztyx · 2013-03-12 11:20:48 7
export key-value pairs list as environment variables

This exports all lines of input file as environment variables, assuming each line is like these: OH=YEAH FU=UUUU
This is sample output - yours may be different.
0

while read line; do export $line; done < <(cat input)

dario · 2013-03-15 08:14:04 10
List LVM Volume Groups as an unprivileged user
This is sample output - yours may be different.
0

cat /sys/block/{*,*/*}/holders/dm*/dm/name | awk -F- '{print $1}' | sort -u

hufman · 2013-04-03 18:00:39 6
Find LVM Volume Group name for a block device
This is sample output - yours may be different.
0

cat /sys/block/md1/holders/dm*/dm/name | awk -F- '{print $1}' | sort -u

hufman · 2013-04-03 18:01:16 5
remove old index.html if you download it again and organiaz the java script tag on the file index.html

remove old index.html if you download it again and organiaz the java script tag on the file index.html
This is sample output - yours may be different.
0

rm index.html | wget www.google.com;cat index.html | sed 's/<script>/\n\n\<script>\n\n/g' | sed 's/<\/script>/>\n\n/g'

lbhack · 2013-04-10 04:05:30 5
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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

Print the current time on the whole screen, updated every second

http://www.joachim-breitner.de/projects#screen-message now also supports reading stdin continuously to update what it shows, different ?slides? separated by a form feed character. Here, we feed the current time into it each second to create a large clock.

Optimal way of deleting huge numbers of files

Optimal way of deleting huge numbers of files Using -delete is faster than: $ find /path/to/dir -type f -print0 | xargs -0 rm $ find /path/to/dir -type f -exec rm {} + $ find /path/to/dir -type f -exec rm \-f {} \;

List of macros defined by gcc

Lists all macros and their values defined by gcc.

List 10 largest directories in current directory

Directories listed in human-readable format

generate random number

Copy structure

Copies a dir structure without the files in it.

Find out my Linux distribution name and version

Disable system bell in an X session

Execute this command in a terminal to disable the system-bell during X-session lifetime.

parrallel execution of a command on remote hosts by ssh or rsh or ...

parrallel execution of a command on remote host by ssh or rsh or ... very useful for cluster management (software update)

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Commands using cat (514)

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