Linux ACLs and user terminal commands

Facl:filesystem access Control list--file system

Save additional access control permissions with file extension properties

SETFACL: Set File extension permissions

-M: Set

U:uid:perm

G:gid:perm

example:setfacl-m g:nichol:rw inittab

D:u:uid:perm (catalogue)

D:g:gid:perm (catalogue)

-x: Cancel

U:uid

G:gid

example:setfacl-x u:nichol inittab

-N: Do not recalculate effective permissions, Setfacl ACL mask is recalculated by default

-B: Remove all extended ACL rules

--mask: Setting effective Permissions

example:setfacl-m mask::rw-inittab

Getfacl: Viewing file extension permissions

Terminal command:

W

W.H.O.

WhoAmI

Last: Displays the/var/log/wtmp file, showing the user login history and System restart history

-N #: Displays information about recent # times

lastb: Display/var/log/wtmp file, display user error login attempt

-N #: Displays information about recent # times

Lastlog: Displays the last successful logon information for each user

-U USERNAME: Displays the most recent login information for the specified user

basename: Get path base name directly

$: Script path and name when executing script

Mail: View messages

hostname: Display host name

Terminal type:

Console: Consoles

Pty: Physical Terminal (VGA)

TTY: Virtual terminal (VGA)

TTYs: Serial terminal

pts/#: Pseudo terminal

Linux ACLs and user terminal commands