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 22:43:08 378
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 14:12:38 144
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 15:23:32 321
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 18:54:24 429
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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Print macOS current power delivery max wattage

Print the max wattage of the current power draw source for a Mac. Note that the current amount of watts drawn may be lower, particularly if a high-wattage adapter is plugged into a Mac that has a full battery.

Mount a partition from dd disk image

Assuming we have a disk image, ie. created by $dd if=/dev/sda of=image.dd we can check the image's partition layout with $fdisk -ul image.dd then, we substitute "x" with starting sector of the partition we want to mount. This example assumes that the disk uses 512 B sectors

statistics in one line

In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

open two files on top of each other in vim (one window, two panes)

Check your hard drive for bad blocks (destructive)

WARNING!!! ALL DATA WILL BE LOST!!! This command should ONLY be run on drives that are meant to be wiped. Data destruction will result from running this command with the '-w' switch. You may run this command with the '-n' switch in place of '-w' if you want to retain all data on the drive, however, the test won't be as detailed, since the '-n' switch provides a non-destructive read-write mode only, whereas '-w' switch actually writes patterns while scanning for bad blocks.

Install pip with Proxy

Installs pip packages defining a proxy

retab in vim, tab to space or space to tab, useful in python

usage： :[rang]ret[!][tabstop value] python is indent sensitive, after command :set list you may see your codes are mixed with tab and space ret can help you to convert space to tab or tab to space

Make vim open in tabs by default (save to .profile)

I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Find all plain text files that do not contain STRING

Disable graphical login on Solaris

With a full installation of Solaris 10, the graphical login and desktop will start by default. This command will disable that feature. To enable it again use: /usr/dt/bin/dtconfig -e

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Commands using cat (514)

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