![]() The sudo command (pronounced "sue due" or "pseudo") lets certain (authorized) UNIX users override these policies by executing the command (everything after the word "sudo" on the command line) as the root user. On both Windows and UNIX computer systems, users can be assigned all kinds of rights, for example rights to access certain directories and files, or to execute certain commands. Yes, changing the default visudo editor is easy.Īnd just because of your dedication, and still reading until here, I'll show you how to set nano or vim to use with visudo command as default editor.Title text: Proper User Policy apparently means Simon Says. Now type what you want to insert, eg "username ALL=(ALL) ALL".Type "o" to insert a new line below it.Find where it says "root ALL=(ALL) ALL".Switch to root, (su root), then run visudo, (as above).Visudo command uses vi as the editor here some tips to use it: If you want not to be asked for a password use this form: go2linux ALL=(ALL) NOPASSWD: ALLĬonsidering that you are still reading here a bonus: # user go2linux may run any command from any machine acting # user user3 may run lpc and lprm from any machine. # user user2 may run any command from any machine in the # The user linus can run any command from any terminal as any ![]() #The users in the OPERATORS group can run any command from So, a typical sudoers file may look like this: User_Alias OPERATORS = joe, mike, jude You can also create aliases for: users -> User_Alias, run commands as other users -> Runas_Alias, host -> Host_Alias and command -> Cmnd_Alias User_Alias OPERATORS = joe, mike, jude Runas_Alias OP = root, operator Host_Alias OFNET = 10.1.2.0/255.255.255.0 Cmnd_Alias PRINTING = /usr/sbin/lpc, /usr/bin/lprmĪs you can see the alias OPERATORS includes the users joe, mike and jude, the alias OP includes the users root and operator, alias OFNET includes the network 10.1.2.0 (all the C class), and the command alias PRINTING includes the commands lpc and lprm. ![]() The above command, makes the user operator can from any terminal, run the command power off. sudoers examples operator ALL= /sbin/poweroff The first part is the user, the second is the terminal from where the user can use sudo command, the third part is which users he may act as, and the last one, is which commands he may run when using sudo. This line means: The root user can execute from ALL terminals, acting as ALL (any) users, and run ALL (any) command. # See the man page for details on how to write a sudoers file.Īlmost all lines are commented out, the one that matters in this sudoers file example is: root ALL=(ALL) ALL # This file MUST be edited with the 'visudo' command as root. Once you enter visudo command, you will see something like this: # /etc/sudoers And you should not edit it directly, you need to use the visudo command. The sudoers file is located at /etc/sudoers. In order to use sudo you first need to configure the sudoers file. I'm sure you are now fully aware of the advantages of using sudo command in a daily basis, how to use it? The two best advantages about using sudo command are: ![]() The best way to understand the sudo command, and the rules in sudoers file, the funny way is by this comics.Īs you can see from this funny picture, using sudo command, makes the system obey any given order. And I always give my account root rights, then I can run commands as root without switching users. The first thing I do when I install a new Linux is to use visudo to edit the sudoers file. I like using sudo, I'm not using Ubuntu anymore. On normal Ubuntu Linux computers you need to use sudo to act as root. This is because the root password is not set in Ubuntu, you can assign one and use it as with every other Linux distribution. If you have ever used used Ubuntu, you know that the root account is disabled. The sudoers file located at: /etc/sudoers, contains the rules that users must follow when using the sudo command. Take Control of your Linux | sudoers file: How to with Examples ![]()
0 Comments
Leave a Reply. |