basic_linux_commands.md

Basic linux commands

Listing commands

ls option_flag arguments --> list the sub directories and files avaiable in the present directory

Examples:

• ls -l--> list the files and directories in long list format with extra information

• ls -a --> list all including hidden files and directory

• ls *.sh --> list all the files having .sh extension.

• ls -i --> list the files and directories with index numbers inodes

• ls -d */ --> list only directories.(we can also specify a pattern)

Directoy commands

• pwd --> print work directory. Gives the present working directory.

• cd path_to_directory --> change directory to the provided path

• cd ~ or just cd --> change directory to the home directory

• cd - --> Go to the last working directory.

• cd .. --> change directory to one step back.

• cd ../.. --> Change directory to 2 levels back.

• mkdir directoryName --> to make a directory in a specific location

Examples:

mkdir newFolder              # make a new folder 'newFolder'

mkdir .NewFolder              # make a hidden directory (also . before a file to make it hidden)

mkdir A B C D                  #make multiple directories at the same time

mkdir /home/user/Mydirectory   # make a new folder in a specific location

mkdir -p  A/B/C/D              # make a nested directory