basic-commands.md

Basic Commands

Navigating in the terminal

pwd outputs present working directory, whoami prints current user.

Working with files and folders

touch create an new file. cp copies a file ex. cp first.txt second.txt -r flag is used to copy directory. mp renames or moves a file ex. cp first.txt second.txt mkdir makes a directory cd changes directory. rm removes a files. rm -rf some-dir removes a directory.

Creating file and folders

Touch newFile.txt someFile.css thirdFile.js creates three files

Head List

head -n 10 few lines from top

tail List

tail -n 10 few lines from bottom

less

less is used to read file in a program similar to vim. CTRL U/D/B can be used for navigation, q quit.

cat

cat is used to concatenate files and read cat first.txt second.txt Outputs concatenation

WC

WC stands for Word Count, it can take flags -l number of lines, -w no. of words, c for no. of bytes.

Redirection

>

is used to redirect output to standard output or stdout for short. ex. echo "Hello World" > someFile.txt

>>

is used to append output to stdout echo "My name is Nava" >> someFile.txt

2> stderr

&> std out plus stderr

Cli fundamentals