Howto: Linux shell restricting access – nixCraft
/sbin/nologin Example (a) First make sure nologin exists in /etc/shells file (else service such as ftp may not allow login) # less /etc/shells If nologin shell does not exist in above shell list, just add /sbin/nologin shell to it:
linux – Running processes with “nologin” shell on Redhat …
The nologin shell prevents just that: login. Any system login service — various ttys, sshd, etc, will deny access because they run the login executable, and that fails. A nologin shell won’t prevent one from running arbitrary commands through a shell once untrusted code is running under that user id.
Execute Commands from Nologin Shell
Hello Masters, I have one user account named “”tomcat”” with nologin shell given to it. Now the requirement from client side is that “”tomcat”” should only execute
What’s different between /bin/false and /sbin/nologin as …
On the other hand, /sbin/nologin has been created for nologin user’s shell, it has a feature to give a message in /etc/nologin.txt. Using /sbin/nologin is recommended for nologin user’s shell, because it is included in /etc/shells.
nologin(8) – Linux manual page
NOLOGIN(8) System Administration NOLOGIN(8) NAME top nologin – politely refuse a login SYNOPSIS top nologin [-V] [-h] DESCRIPTION top nologin displays a message that an account is not available and exits non-zero.It is intended as a replacement shell field to deny login access to an account.
How to Block or Disable Normal User Logins in Linux
How to Block User Logins Using nologin Shell. This method works a little differently: it only blocks a user from accessing a shell. But he or she can log on to the system via programs such as ftp that do not necessarily require a shell for the user to connect to a system.. Additionally, it can allow you to block shell access to specific users in special scenarios.
CentOS / RHEL : How to Change the login shell of the user …
The file /etc/shells the full paths for all the login shells available on the system. So, to set the particular shell, the shell entry must be present in /etc/shells file. To change the shell you can either user useradd or chsh command.
Linux and Unix no login shells: /bin/false vs /sbin/nologin
The /sbin/nologin for Fedora and /usr/sbin/nologin for Debian are two shells that return you a polite message like “this account is not available” and do not allow you to log into the system. This message can be customized. /bin/false is an old shell used to deny a user’s login.