Linux Disable Shell / FTP Access For a User Account last updated June 24, 2009 in Categories BASH Shell, CentOS, csh, Debian / Ubuntu, Fedora Linux, File system, KSH Shell, Linux, RedHat and Friends, Security, Ubuntu LinuxMy users will only be checking mail, and I want to disable FTP access as well as shell access under CentOS Linux. How do I disable shell (SSH) and FTP access to a new or old user under Linux without deleting user account?