How can you find out what services are running in Linux?

Answer 1

Most Linux distros are supplied with a number of process monitoring tools; the most used and most flexible is ps.top and htop mostly provide the same information in a more friendly format. Interpreting these commands requires some knowledge of the programs themselves, but most should have at least a man page. The grep command can help you filter the results to a specific program:

$ps ax | grep httpd

5392 ? S 0:00 /root/ispconfig/cronolog --symlink=/var/log/httpd/ispconfig_access_log /var/log/httpd/ispconfig_access_log_%Y_%m_%d

5404 ? S 0:00 /usr/sbin/httpd

5409 ? S 0:00 /usr/sbin/httpd

5416 ? S 0:00 /usr/sbin/httpd

5418 ? S 0:00 /usr/sbin/httpd

5420 ? S 0:00 /usr/sbin/httpd

5422 ? S 0:00 /usr/sbin/httpd

5424 ? S 0:00 /usr/sbin/httpd

5425 ? S 0:00 /usr/sbin/httpd

12286 ? Ss 0:04 /usr/sbin/httpd

25543 pts/0 R+ 0:00 grep httpd

30781 ? Ss 0:29 /root/ispconfig/httpd/bin/ispconfig_httpd -DSSL

30790 ? S 0:12 /root/ispconfig/httpd/bin/ispconfig_httpd -DSSL

30999 ? S 0:12 /root/ispconfig/httpd/bin/ispconfig_httpd -DSSL