Commands using cat sorted by votes

Commands using cat (514)

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Ad blocking on Ubuntu phone/tablet with hosts file

Will append lines to the hosts file to do some basic ad blocking.
This is sample output - yours may be different.
4

sudo mount -o remount,rw / && sudo cp /etc/hosts /etc/hosts.old && wget http://winhelp2002.mvps.org/hosts.txt && cp /etc/hosts ~/ && cat hosts.txt >> hosts && sudo cp hosts /etc/hosts

bugmenot · 2016-06-06 15:01:19 13
Print sensors data for your hardware
This is sample output - yours may be different.
4

paste <(cat /sys/class/thermal/thermal_zone*/type) <(cat /sys/class/thermal/thermal_zone*/temp) | column -s $'\t' -t | sed 's/$.$..$/.\1°C/'

wuseman1 · 2022-03-29 22:43:08 385
Bypass with hexencoding, dump /etc/passwd
This is sample output - yours may be different.
4

cat $(echo -e "\x2f\x65\x74\x63\x2f\x70\x61\x73\x73\x77\x64")

wuseman1 · 2023-01-14 06:43:27 1046
useless load

check your load with top... Start more of these jobs to get an multi-core cpu busy... Show Sample Output
This is sample output - yours may be different.
```
[1] 12345
```
3

cat /dev/urandom | gzip -9 > /dev/null &

jacquesloonen · 2009-02-16 14:12:38 158
Monitor Linux/MD RAID Rebuild
This is sample output - yours may be different.
3

watch -n 5 -d cat /proc/mdstat

wwest4 · 2009-03-03 21:38:50 28
Merge several pdf files into a single file
This is sample output - yours may be different.
3

pdftk $* cat output $merged.pdf

svg · 2009-06-26 07:36:02 11
Export log to html file

Logtool is a nice tool that can export log file to various format, but its strength lies in the capacity of colorize logs. This command take a log as input and colorize it, then export it to an html file for a more confortable view. Logtool is part of logtool package.Tested on Debian.
This is sample output - yours may be different.
3

cat /var/log/auth.log | logtool -o HTML > auth.html

servermanaged · 2009-07-03 18:17:22 10
Count all conections estabilished on gateway
This is sample output - yours may be different.
3

cat /proc/net/ip_conntrack | grep ESTABLISHED | grep -c -v ^#

flamarion · 2009-07-29 20:21:25 5
Remove newlines from output

Pipe any output to "grep ." and blank lines will not be printed.
This is sample output - yours may be different.
3

cat filename | grep .

fraktil · 2009-08-09 01:00:59 4
Quickly Encrypt a file with gnupg and email it with mailx

This is a quick and easy way of encrypting files in a datastream, without ever really creating an output file from gpg. Useful with cron also, when file(s) have to be sent based on a set schedule.
This is sample output - yours may be different.
3

cat private-file | gpg2 --encrypt --armor --recipient "Disposable Key" | mailx -s "Email Subject" user@email.com

slashdot · 2009-10-19 20:38:37 4
Quick notepad

Quick write some notes to a file with cat. Ctrl+C when you have finish.
This is sample output - yours may be different.
3

cat > list -

servermanaged · 2009-10-29 20:20:11 28
Block all IP addresses and domains that have attempted brute force SSH login to computer

Searches all log files (including archived bzip2 files) for invalid user and PAM authentication errors, both of which are indicative of brute force attempts at logging into computer. A list of all unique IP addresses and domain names is appended to hosts.deny. The command (and grep error messages) will work on Mac OS X 10.6, small adjustments may be needed for other OSs.
This is sample output - yours may be different.
3

(bzcat BZIP2_FILES && cat TEXT_FILES) | grep -E "Invalid user|PAM" | grep -o -E "from .+" | awk '{print $2}' | sort | uniq >> /etc/hosts.deny

jayhawkbabe · 2010-01-03 04:41:51 10
Show the command line of a process that use a specific port (ubuntu)
This is sample output - yours may be different.
3

cat /proc/$(lsof -ti:8888)/cmdline | tr "\0" " "

glaudiston · 2010-02-24 17:10:40 5
Combining text files into one file
This is sample output - yours may be different.
3

cat *.txt >output.txt

jmcantrell · 2010-04-16 14:06:47 6
Produces a list of when your domains expire

Create a text file called domainlist.txt with a domain per line, then run the command above. All registries are a little different, so play around with the command. Should produce a list of domains and their expirations date. I am responsible for my companies domains and have a dozen or so myself, so this is a quick check if I overlooked any.
This is sample output - yours may be different.
3

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

netsaint · 2010-05-02 06:49:09 6
Displaying system temperature

Displaying system temperature your system . shellcode version @ http://inj3ct0r.com/exploits/12554 Show Sample Output
This is sample output - yours may be different.
```
gunslinger@localhost:~$ cat /proc/acpi/thermal_zone/THRM/temperature
temperature:             59 C
gunslinger@localhost:~$ 
```
3

cat /proc/acpi/thermal_zone/THRM/temperature

gunslinger_ · 2010-07-11 16:07:07 3
Find Out My Linux Distribution Name and Version
This is sample output - yours may be different.
3

cat /etc/*-release

evandrix · 2011-06-22 11:55:20 4
easily strace all your apache *child* processes

Like the original version except it does not include the parent apache process or the grep process and adds "sudo" so it can be run by user.
This is sample output - yours may be different.
3

ps h --ppid $(cat /var/run/apache2.pid) | awk '{print"-p " $1}' | xargs sudo strace

colinmollenhour · 2012-03-21 01:59:41 3
Compare a remote file with a local file
This is sample output - yours may be different.
3

diff <(ssh user@host cat /path/to/remotefile) /path/to/localfile

gburiola · 2012-06-16 10:24:48 4
Put split files back together, without a for loop

After splitting a file, put them all back together a lot faster then doing cat file1 file2 file3 file4 file5 > mainfile or for i in {0..5}; do cat file$i > mainfile; done When splitting, be sure to do split -d for getting numbers instead of letters
This is sample output - yours may be different.
3

cat file{0..5} > mainfile

snipertyler · 2013-08-17 04:15:45 7
Backup all databases in a MySQL container
This is sample output - yours may be different.
3

cat databases.txt | while read db; do docker exec $container_name bash -c "mysqldump -uroot -p\$MYSQL_ROOT_PASSWORD ${db}" | gzip -9 > $HOME/backups/${db}_`date +%Y%m%d_%H%M%S`.sql.gz; done

batandwa · 2018-09-02 15:23:32 322
Insert a line at the top of a text file without sed or awk or bash loops

Just use '-' to use STDIN as an additional input to 'cat'
This is sample output - yours may be different.
3

echo "New first line" | cat - file.txt > newfile.txt; mv newfile.txt file.txt

gpenguin · 2018-10-18 18:54:24 430
Print your cpu intel architecture family
This is sample output - yours may be different.
3

cat /sys/devices/cpu/caps/pmu_name

wuseman1 · 2020-01-01 04:57:27 101
Split and join with split and cat.

`split -b 1k file` splits files into 1k chunks. Rejoin them with `cat x* > file`.
This is sample output - yours may be different.
2

split -b 1k file ; cat x* > file

abcde · 2009-02-08 23:10:18 10
Copy text to the clipboard

Great for little scripts that dig up obscure info that you are going to have to paste into another app anyway.
This is sample output - yours may be different.
2

cat SomeFile.txt | pbcopy

unixmonkey734 · 2009-02-13 15:23:10 9
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Cryptographically secure 32-bit RNG in strict ZSH

ZSH ships a couple random number generators via the $RANDOM environment variable and rand48() via zsh/mathfunc, but neither are cryptographically secure. This code produces a 32-bit random number suitable for cryptography. It's only dependency is /dev/urandom and it does not rely on any shell commands or 3rd party utilities. It assumes ZSH was compiled with 64-bit integer support.

Unlock more space form your hard drive

This command changes the reserved space for privileged process on '/dev/sda' to 1 per cent.

Copy all files, including hidden files, recursively without traversing backward

You could do the following, however, brace expansion with {} is not defined in POSIX, and therefore not guaranteed to work in all shells. But, if it does, it's more convenient (although it's certainly not less typing): $ cp -r {*,.??*} /dest Sometimes there are times when I need to cp(1), mv(1) or rm(1) files recursively, but don't want to traverse the previous directory by following ../../../../ etc out of the current directory. This command prevents that. The secret sauce is ".??*". The file globbing ensures that it must start with a dot, and be followed by at least two characters. So, three characters must exist in the filename, which eliminates "." and "..".

Perl Command Line Interpreter

My Programming Languages professor assigned my class a homework assignment where we had to write a Perl interpreter using Perl. I really like Python's interactive command line interpreter which inspired this Perl script.

Discover full java className for import;

If you want to code without a IDE, using java may be painful to discover correct full class names to import. This script google it with javadoc word, then with some luck we got the javadoc as first item. next it curl the target javadoc and extract full name from it. Can by customized to extract other javadoc infos. Pre-reqs: bash, google-chrome, html2text and core-utils

Find files modified since a specific date

This command uses -newerXY to show you the files that are modified since a specific date. I recommend looking for "-newerXY" on the manpage to get the specifics.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Get number of users on a minecraft server

I'm flat-out surprised that minecraft directory services require servers install multiple modifications to their server code, when the directories could fetch this information on their own.

Grab just the title of a youtube video

There's another version on here that uses GET but some people don't have lwp-request, so here's an alternative. It's also a little shorter and should work with most youtube URLs since it truncates at the first &

Url Encode

Returns URL Encoded string from input ($1).

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Commands using cat (514)

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