# netstat -a -p -n | grep ssh
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 16505/sshd tcp6 0 0 :::22 :::* LISTEN 16505/sshd unix 2 [ ACC ] STREAM LISTENING 7032 1520/ssh-agent /tmp/ssh-DOfouk1486/agent.1486 unix 2 [ ACC ] STREAM LISTENING 7460 1468/gnome-keyring- /tmp/keyring-ehhgwv/ssh
# netstat -naple|grep sendmail
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 0 4351072 18951/sendmail: acc tcp 0 0 127.0.0.1:25 127.0.0.1:40629 ESTABLISHED 0 4351084 18962/sendmail: p93 unix 2 [ ] DGRAM 4351052 18951/sendmail: acc
1
Для просмотра портов и программ на них, используй sockstat
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