linux_cool_commands

https://telehack.com/

rev file.txt

factor 100

yum install cowsay

cowsay we are LW

yes i m Lw

espeak-ng "i love you"

chpasswd

user1:pass1 user2:pass2 user3:pass3

ctrl +d

gnome-screenshot -f file.png

eof file.png

man -k # use / and search for a term by typing it

hide ur work

ctrl + s unhide ctrl + q

Alt+Backspace: Deletes the previous word. Alt+F: Skips ahead to the next space. Alt+B: Skips back to the previous space. Ctrl+U: Cuts all text up to the cursor. Ctrl+K: Cuts all text after the cursor until end of line. Ctrl+A: Moves the cursor to the start of line. Ctrl+E: Moves the cursor to the end of line. CTRL, and U It can remove the complete command (line).

shutdown 14:00

script

script -T mytime.log

scriptreplay -T mytime.log

Use !{command} for executing the previous instance of command quickly Use !! for Executing the Last Command Use “CTRL+R” for Repeating the Last Matching Command

nohup firefox

echo file01 file02 | xargs touch

mtr www.google.com

“nl command” to list them in a numbered fashion.

nl /etc/passwd

ls | shuf (shuffle Input)

“last” command show the history of last logged in users. T

how do you obtain your External IP address

curl ifconfig.me

yum install figlet

watch -t -n1 "date +%T|figlet"

yum install dstat

dstat

‘bind -p‘ command will show all the shortcuts available for BASH shell.

user accounting command, ac

$ ac -d $ ac -p

type dir rather than ls because you've worked with the Microsoft Windows command line and can't break the habit

ls -la /usr/bin/dir ls -la /usr/bin/ls

$ zipcloak zipfile.zip $ unzip zipfile.zip

authconfig --enablefaillock --faillockargs="deny=3 unlock_time=600" --update

~]# grep -i faillock /etc/sysconfig/authconfig FAILLOCKARGS="deny=3 unlock_time=600" USEFAILLOCK=yes

~]# authselect enable-feature with-faillock ~]# grep -vE '^#|^$' /etc/security/faillock.conf silent deny = 3 unlock_time = 600 ~]# authselect disable-feature with-faillock

~]# faillock --reset --user user1

Linux locking Password

passwd -l {username} passwd -u {username}

sudo !! alias gerp=grep

get top process eating memory

ps auxf | sort -nr -k 4 | head -10

pip3 install thefuck --user

fuck

https://github.com/nvbn/thefuck?ref=hackernoon.com

vim +X filename

Find if there are files containing specific text

grep -Pri Search_Term path_to_directory

find /home/user -type f sensetive_data.txt find. -type f -size 100M

find /home/user/sensetive_files/ -type f -exec chmod 644 {}

use the previous argument:

cd !$

you want to perform a specific task but don’t know the correct command.

apropos "copy files"