Auditing system services with systemctl

On Linux systems that come with systemd, the systemctl command is pretty much a universal command.

To view the status of services:

sudo systemctl -t service --state=active


  • -t service: We want to view information about the services – or, what used to be called daemons – on the system.

  • --state=active: This specifies that we want to view information about all the system services that are actually running.

This command shows the status of every service that’s running on your system. Generally, you do not want to see much information, although you might at times.

Candidates for removal

Depending on what the server is for:

  • smbd and nmbd indicates a Samba Process. Do you really need to export smb share on windows or other machine?

  • telnet for bidirectional interactive text-oriented communication over internet or local area network?

  • rlogin to log in to another host over network?

  • rexec to execute shell commands on a remote computer.

  • ftp to transfer files from one host to another host over Internet?

  • automount to mount different file systems automatically to bring up network file system?

  • named to run NameServer (DNS)?

  • lpd to print to the server.

  • inetd? If you are running standalone applications like ssh which uses other standalone application like mysql, Apache, etc. then you don’t need inetd.

  • portmap, an Open Network Computing Remote Procedure Call (ONC RPC) which uses rpc.portmap and rpcbind. If these processes are running, you are running NFS server. Really? NFS server is running unnoticed?

Stop and disable

To stop a service, then prevent it from restarting at reboot:

sudo systemctl stop <service>
sudo systemctl disable <service>


sudo systemctl stop smbd
sudo systemctl disable smbd