This chapter is from the book
Testing the Status of VSFTPD
You can always test whether the VSFTPD process is running by using the netstat -a command, which lists all the TCP and UDP ports on which the server is listening for traffic. This example shows the expected output:
[root@bigboy root]# netstat -a | grep ftp tcp 0 0 *:ftp *:* LISTEN [root@bigboy root]#
If VSFTPD wasn’t running, there would be no output at all.