sudo

Executes a single command as the superuser or another user.

=> More information.

• Run a command as the superuser:

sudo {less /var/log/syslog}

• Edit a file as the superuser with your default editor:

sudo --edit {/etc/fstab}

• Run a command as another user and/or group:

sudo --user={user} --group={group} {id -a}

• Repeat the last command prefixed with sudo (only in bash, zsh, etc.):

sudo !!

• Launch the default shell with superuser privileges and run login-specific files (.profile, .bash_profile, etc.):

sudo --login

• Launch the default shell with superuser privileges without changing the environment:

sudo --shell

• Launch the default shell as the specified user, loading the user's environment and reading login-specific files (.profile, .bash_profile, etc.):

sudo --login --user={user}

• List the allowed (and forbidden) commands for the invoking user:

sudo --list

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