Importantly, if we donât provide any password to a user, they wonât be able to login in via the terminal. Here, weâll notice that there will be no login screen and weâll just return to our current terminal session. After weâve entered the information for the user, letâs try a switch: $ su - testuser3 Here, the âshell or -s flag sets the login shell for the user. Ĭreating home directory `/home/testuser3'. Letâs create a user with the /bin/false shell: $ sudo adduser testuser3 -shell=/bin/falseĪdding new user `testuser3' (1001) with group `testuser3'. However, they can still get emails and work with other utilities. This is a variation on Legooolas's two-layer newgrp trick, but it is in one line and doesn't require you to manually enter your primary group. If you're only adding one group, I used the following: exec sg 'newgrp id -gn'.Of course, users with /bin/false as a shell arenât able to log in as usual. Getting a shell with the new group without logging out and in again. The entry for each such user ends with the location of false: /bin/false. Vboxadd:x:997:1::/var/run/vboxadd:/bin/false To ensure your commits in Bitbucket appear with your user account, it must meet two conditions: Youve configured Git with a global username/email address. Pollinate:x:110:1::/var/cache/pollinate:/bin/false Tss:x:106:111:TPM software stack,:/var/lib/tpm:/bin/false To see the list of users with /bin/false as a shell, we can again turn to /etc/passwd: $ cat /etc/passwd | grep /bin/false Similar to nologin, false is not really a shell but a command. However, some built-in accounts also work with /bin/false. Indeed, Debian systems like Ubuntu use the /usr/sbin/nologin shell for non-login users. The default will be a temporary file that's used by visudo to check for syntax errors before saving to the actual sudoers file. The editor will ask you for the file name to write into. username ALL (ALL) ALL Change the user name before you issue the commands. Testuser2:x:1001:1001:,:/home/testuser2:/bin/bashĪlthough we arenât able to log in, the shell for our user is still /bin/bash. Add the below line to the end of the file. Critically, we can simply use any standard tool to assign a password.Īgain, letâs check the /etc/passwd file for testuser2: $ cat /etc/passwd | grep 'testuser2' Letâs see what happens when we try to switch to this user: $ su - testuser2Ĭlearly, we canât log in with our user testuser2 since we have no password. Thus, until a passwordâs provided to the account, it wonât be active. The latter ensures no password-setting utility (like passwd) runs as part of the user creation process. The user creation is almost the same as for a system user, but with the âdisabled-login flag. Ĭreating home directory `/home/testuser2'. To do that, weâll use the âdisabled-login option of the adduser command: $ sudo adduser testuser2 -disabled-loginĪdding new user `testuser2' (1001) with group `testuser2'. Letâs now create a non-system user testuser2 with a disabled login.
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