Commands using cat sorted by votes

Commands using cat (514)

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cut log with row number,like from row number to another row number.

cut log from row 100 to row 150.
This is sample output - yours may be different.
0

cat -n install | head -n 150 | tac | head -n 50 | tac

cuizhaohua · 2013-05-02 08:11:04 6
cut log from line 50 to line 88

cut log from line 50 to line 88
This is sample output - yours may be different.
0

cat -n install.log | head -88 | tac | head -n $(( 88 - 50 )) | tac

cuizhaohua · 2013-05-02 08:39:54 6
Put files back together after encrypted with tar and ccrypt
This is sample output - yours may be different.
0

cat file.gz.cpt *[a-z] | ccdecrypt -k yoursecretpassword | tar -xzf -

symgryph · 2013-05-10 12:44:12 9
Produces a list of when your domains expire
This is sample output - yours may be different.
0

cat domainlist.txt | while read line; do echo -ne $line; whois $line | grep Expiration ; done | sed 's:Expiration Date::'

jun3337 · 2013-05-13 02:55:17 8
Transfer 1 file with ssh

Where filein is the source file, destination.com is the ssh server im copying the file to, -c arcfour,blowfish-cbc is selecting the fastest encryption engines, -C is for online compressions and decompression when it comes off the line - supposed to speed up tx in some cases, then the /tmp/fileout is how the file is saved... I talk more about it on my site, where there is more room to talk about this: http://www.kossboss.com/linuxtarpvncssh and http://www.kossboss.com/linux---transfer-1-file-with-ssh Show Sample Output
This is sample output - yours may be different.
```
Where filein is the source file, destination.com is the ssh server im copying the file to, -c arcfour,blowfish-cbc is selecting the fastest encryption engines, -C is for online compressions and decompression when it comes off the line - supposed to speed up tx in some cases, then the /tmp/fileout is how the file is saved...

I talk more about it on my site, where there is more room to talk about this:
http://www.kossboss.com/linuxtarpvncssh
and
http://www.kossboss.com/linux---transfer-1-file-with-ssh
```
0

cat filein | ssh destination.com -c arcfour,blowfish-cbc -C -p 50005 "cat - > /tmp/fileout"

bhbmaster · 2013-05-30 07:18:46 6
diff remote and local sshd_configs
This is sample output - yours may be different.
0

colordiff <(ssh user@host cat /etc/ssh/sshd_config) /etc/ssh/sshd_config

ssstonebraker · 2013-08-08 15:43:04 6
Create a CD/DVD ISO image from disk.
This is sample output - yours may be different.
0

cat /dev/cdrom > ~/img.iso

fhh · 2013-09-17 19:08:54 6
IBM AIX: Verify a sha256sum listing with openssl

This command is used to verify a sha256sum-formatted file hash list on IBM AIX or any other UNIX-like OS that has openssl but doesn't have sha256sum by default. Steps: 1: Save to the filesystem a script that: A: Receives as arguments the two parts of one line of a sha256sum listing B: Feeds a file into openssl on SHA256 standard input hash calculation mode, and saves the result C: Compares the calculated hash against the one received as argument D: Outputs the result in a sha256sum-like format 2: Make the script runnable 3: Feed the sha256sum listing to xargs, running the aforementioned script and passing 2 arguments at a time Show Sample Output
This is sample output - yours may be different.
```
cognos-EARs/ServletGateway-1021-SDK-customized.ear: OK
cognos-EARs/ServletGateway-1021-SDK-customizedandfixed.ear: OK
cognos-EARs/ServletGateway-1021-base.ear: OK
cognos-EARs/p2pd-1021-SDK-customized.ear: OK
cognos-EARs/p2pd-1021-base.ear: OK
```
0

echo '#! /usr/bin/ksh\ncat $2 | openssl dgst -sha256 | read hashish; if [[ $hashish = $1 ]]; then echo $2: OK; else echo $2: FAILED; fi;' > shacheck; chmod +x shacheck; cat hashishes.sha256 | xargs -n 2 ./shacheck;

RAKK · 2013-09-18 21:51:20 8

Display a numbered list of 50 biggets files sorted by size (human readable)

du -ah | sort -hr | head -n50 | cat -n

rgregor · 2013-10-01 10:16:13 6

Display a numbered list of files bigger than 500K, sorted by size (human readable)

"find ./ ..." could be replaced with "find $PWD ..." to display absolute path instead of relative path. Show Sample Output
This is sample output - yours may be different.
```
     1  4.1M ./ydownloads/youtube-dl.exe
     2  3.1M ./docs/Learn-Linux-and-get-certified_20120711.pdf
     3  1.4M ./docs/building-NAS-Server.doc
     4  772K ./docs/port-numbers.txt
     5  748K ./docs/building-NAS-Server.pdf
     6  592K ./docs/VIM_UG.txt
     7  548K ./docs/navodila-upn.pdf
```
0

find ./ -type f -size +500k -exec ls -1Ash {} \; | sort -hr | cat -n

rgregor · 2013-10-01 10:32:28 5
Convert input to a line of quote protected CSV
This is sample output - yours may be different.
0

cat file | paste -s -d'%' - | sed 's/$^\|$$/"/g;s/%/","/g'

JohnGH · 2013-11-12 17:48:10 15
You can access some-image.html where you include a image any other file than you can access it through http using a browser (e.g. http://xxx.xxx.xxx.xxx:12345 )
This is sample output - yours may be different.
0

cat some-image.html | nc -v -l -p 12345

stefan1st · 2014-01-20 07:05:11 8
Check fstab volumes and volumes mounted.

With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.
This is sample output - yours may be different.
0

diff <(cat /etc/fstab | grep vol | grep -v "^#" | awk '{print $1}') <(df -h | grep vol)

Koobiac · 2014-01-23 15:18:08 11
TCP server on one socket

A TCP server that keeps the same socket open, sending the contents of "file" repeatedly.
This is sample output - yours may be different.
0

while true; do cat "file"; done | nc -v -l 1337

bknk · 2014-02-06 03:02:58 6
Convert metasploit cachedump files to Hashcat format for cracking
This is sample output - yours may be different.
0

cat cachedump.txt | awk -F : '{print $2":"$1}'

greatodensraven · 2014-02-25 17:19:38 7
Save a result based on a command's output in a variable while printing the command output

Many circumstances call for creating variable of a summary result while still printing the original pipe. Inserting "tee >(cat >&2)" allows the command output to still be printed while permitting the same output to be processed into a variable. Show Sample Output
This is sample output - yours may be different.
```
Mar 11 18:02:35 hostname kernel: [    0.896119] [drm:intel_dp_i2c_aux_ch] *ERROR* 
Mar 11 18:02:35 hostname kernel: [    0.898782] [drm:intel_dp_i2c_aux_ch] *ERROR* 
Mar 11 18:02:35 hostname kernel: [    3.123365] [drm:udl_parse_] *ERROR* 

>> echo $num_errs
3
```
0

num_errs=`grep ERROR /var/log/syslog | tee >(cat >&2) | wc -l`

accountholder · 2014-03-12 00:04:24 11
Bruteforce dm-crypt using dictionary

Lost your luks passphrase? You can always bruteforce from the command line. See the sample output, a simple command using a dictionary. Show Sample Output
This is sample output - yours may be different.
```
# cat dictionary.txt|while read a; do echo $a; echo $a|cryptsetup luksOpen /dev/sda5 $a && echo KEY FOUND; done
pass
No key available with this passphrase.
PasS
No key available with this passphrase.
PASs
No key available with this passphrase.
PA5s
No key available with this passphrase.
P4s5
KEY FOUND
...

# ls -l /dev/mapper/
total 0
crw------T 1 root root 10, 236 Apr 16 19:49 control
lrwxrwxrwx 1 root root       7 Apr 16 20:34 P4s5 -> ../dm-1
```
0

cat dictionary.txt|while read a; do echo $a|cryptsetup luksOpen /dev/sda5 sda5 $a && echo KEY FOUND: $a; done

rodolfoap · 2014-04-16 18:49:53 10
To Find CVE fix from the rpm log

Found it online and could be very useful
This is sample output - yours may be different.
0

for i in $(cat vulns.txt); do echo $i; rpm -qa ?changelog | grep -i $i; done

sonny108 · 2014-04-30 16:11:14 6
ssh copy
This is sample output - yours may be different.
0

cat ~/.ssh/id_rsa.pub | ssh deployer@xxxxx -p 52201 'cat >> ~/.ssh/authorized_keys'

sahin · 2014-05-11 03:15:56 11
Get own public IP address

This is the command line I use to get my IP address in order to update my zoneedit account. Full script on my blog http://akim.sissaoui.com/linux-attitude/script-de-mise-a-jour-ddns-zoneedit-com-en-bashsh/ Show Sample Output
This is sample output - yours may be different.
```
82.146.xxx.xxx
```
0

$ wget --no-check-certificate -q checkip.dyndns.org -O index.html && cat index.html|cut -d ' ' -f 6 | cut -d '<' -f 1

Superkikim · 2014-05-12 07:10:29 8
Query VirusTotal Hash DB using a Public APIKEY

Replace "APIKEY" with your public apikey Show Sample Output
This is sample output - yours may be different.
```
VTHits 
VTHits 46,md5:99017f6eebbac24f351415dd410d522d
VTHits 0,md5:ca4293242b7679bdc057d3437f6977d4
VTHits 
VTHits 
```
0

cat h.txt| while read line; do curl -s -X POST 'https://www.virustotal.com/vtapi/v2/file/report' --form apikey="APIKEY" --form resource="$line"|awk -F'positives\":' '{print "VTHits"$2}'|awk -F' ' '{print $1" "$2$5$6}'|sed 's/["}]//g' && sleep 15; done

jsbrown · 2014-07-17 16:10:28 7
Save a file you edited in vim without the needed permissions
This is sample output - yours may be different.
0

w !sudo cat >%

parsa · 2014-08-03 17:31:01 7
search system log for spamassassin score and list only 15th column
This is sample output - yours may be different.
0

cat /var/log/syslog | grep score= | awk '{print $15}' | more

unix1776 · 2014-08-21 21:40:17 8
Resource Monitoring

Monitoring system in one line : DISK : disk space MEM: memory ( mem , swap, Total) CPU : all information about cpu activity LOAD : load average Show Sample Output
This is sample output - yours may be different.
```
DISK:
94% /
6% /boot
0% /dev/shm
MEM:
total used free shared
Mem: 7983 7580 403
Swap: 12287 6 12281
Total: 20271 7586 12685
CPU:
0.3%us, 0.2%sy, 0.1%ni, 98.2%id, 1.1%wa, 0.0%hi, 0.1%si, 0.0%st
LOAD:
0.02 0.03 0.00 1/417 15018
```
0

echo "DISK:";df -Pl | grep -v "Filesystem" | awk '{print $5,$6}' ; echo "MEM:" ; free -mto | awk '{ print $1,$2,$3,$4 }'; echo "CPU:"; top -b -d1 -n1 | grep Cpu | awk '{print $2,$3,$4,$5,$6,$7,$8,$9}';echo "LOAD:"; cat /proc/loadavg

injez · 2014-09-29 12:43:52 35
Get domains on the server

Allows you to have a list of the domains on the server.
This is sample output - yours may be different.
0

cat /etc/named.conf | grep -Po '(?<=(named/)).*(?=\.db)'

KonKar · 2014-10-25 20:16:17 6
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Create an SSH connection (reverse tunnel) through your firewall.

Allows you to establish a tunnel (encapsulate packets) to your (Server B) remote server IP from your local host (Server A). On Server B you can then connect to port 2001 which will forward all packets (encapsulated) to port 22 on Server A. -- www.fir3net.com --

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"

bash script to zip a folder while ignoring git files and copying it to dropbox

Better tool for exporting git's repository is Git itself!

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"

Convert ascii string to hex

Here's a version that uses perl. If you'd like a trailing newline: $ perl -pe 's/(.)/sprintf("\\x%x", ord($1))/eg; END {print "\n"}'

Rename files in batch

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Protect directory from an overzealous rm -rf *

Forces the -i flag on the rm command when using a wildcard delete.

alias to close terminal with :q

Put this in your ~/.bashrc file (or the equivalent) If you use vim a lot, this alias will be immediately obvious. Your brain will thank you.

Get the full path to a file

Useful in scripts when the file is passed in as an argument. Eg. $ filepath=$(realpath $1)

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Commands using cat (514)

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