ftp only

[hangyu]

If I want to let the user to access the system via ftp , so that the user can't access the system via other way , like ssh , telnet , what can i do ? thx

[g33k]

well edit /etc/passwd na instaed of /bin/sh(ksh, bsah) give them /bin/nologin

it means after connection no shell is run, so they cannot workin with system using telnet or ssh

[Steven E. Protter]

Shalom hangyu,

Set the shell to /usr/bin/false or /usr/bin/nologin.

Make sure these are defined in /etc/shells

SEP

[Alexander Chuzhoy]

Just to add that you can assign the shell upon user creation with:
useradd -s /sbin/nologin username

or change the shell for existing user with:
usermod -s /sbin/nologin username

[George Liu_4 · Accepted solution]

The above mentioned is a good practice.