Useful Linux Commands

Useful Linux Commands

-- Deepak Modak

bc An arbitrary precision calculator language

cat - concatenate files and print on the standard output

tac - print files in reverse

Eg : cat filename

tac filename

ls - list directory contents

sl - display animations aimed to correct users who

accidentally enter sl instead of ls.

* sl is not a linux command , need to install package

file - determine the type of file

stat - display file or file system status

Eg : file filename

stat filename

factor

Print the prime factors of each specified integer

Eg : factor 18

sudo !!

Run the last command as root. It automatically prepend sudo to the last command entered.

cd –change to the previous working directory

man ascii

Quick access to the ascii table.

curl ifconfig.me

Print external IP address

wget --random-wait -r -p -e robots=off -U mozilla http://www.example.com

The non-interactive network downloader It will download all files, including images mozilla as browsers

identity .

Ctrl-l

Clear the terminal screen

du -h –max-depth=1List the size of all sub folders from the current location

Ihuman readable form

du | sort -nr | less

List of files and folders, sorted in descending order by size.

python -m SimpleHTTPServer

Serve current directory tree on port 8000. http://localhost:8000/

# Tag

Hash tags to organize bash history and very good for finding very long commands

Step : • Just add a hash tag in every command you type at the end,• Later can search for the hash tag in reverse-i-search (Ctrl + R).

Eg: $ tar -xzvf filename #untarNow, just Ctrl + R, and type untar and you get the command!

# in shell means a comment.