Shell

Useful Commands

Command	Description
pwd	Show present working directory
cd <dir_name>	Change directory
ls	List directory
mkdir <dir_name>	Make a directory
touch <file_name>	Create a new file *
rm <file_name>	Delete file
rm -rf <dir_name>	Delete no empty directory
rmdir <dir_name>	Delete only empty directory
man <command>	Manual page for a command
echo <"text"> or <file_name>	Outputs the strings that are passed to it as arguments
cat <file_name>	Show file contents
cp	Copy file
mv	Move or rename file
diff <file_name_1> <file_name_2>	Generates output describing the differences between the two files
chmod	Changes file permission
grep grep -r <keyword> ls | grep <keyword>	Global ReGex Print

Tip

For most commands, is possible get more details about it using use the --help flag.

Running Multiple Commands in One Line

• ; always run the next command.
• && only run the next command when the first succeeds.
• || only run the next command when the first fails.

# cmd_1; cmd_2
cd <folder_name>; ls
 
# cmd_1 && cmd_2
cd <folder_name> && ls
 
# cmd_1 || cmd_2
cd <folder_name> || ls