linux_commands

General

Navigate the file system:

• cd

Examine directories and their contents:

• pwd
• ls
• tree

Find files:

• find

Modify file permissions:

• chmod e.g. chmod a+x myscript.sh, chmod u+rw,go-rwx private.txt

Create files and directories:

• touch
• mkdir

Copy, move or delete files and directories:

• cp
• mv
• rm

Examine files and their contents:

• file
• cat
• less
• head
• tail
• wc
• sort

Search within a file:

• grep e.g. grep “juice” shopping-list.txt, grep “error” /var/log/*

Printing text or variables:

• echo

Work with variables and aliases:

• alias
• export
• source

Redirection:

• <, >, >>

Pipes:

• |

Process

View information about processes:

• ps
• top
• pidof

Start a process in the background:

• &

Terminate a process:

• CTRL + C
• kill
• kill -9

Redirection:

• 2>, 2>&1