Here are the different keywords that may be used to control the output format (e.g. with option -o) or to sort the selected processes with the GNU-style –sort option.
For example:
ps -eo pid,user,args –sort user
This version of ps tries to recognize most of the keywords used in other implementations of ps. The following user-defined format specifiers may contain spaces: args, cmd, comm, command, fname, ucmd, ucomm, lstart, bsdstart, start.
fuser - identify processes using files or sockets
In order to look up processes using TCP and UDP sockets, the corresponding name space has to be selected with the -n option. By default fuser will look in both IPv6 and IPv4 sock-ets. To change the default, behavior, use the -4 and -6 options. The socket(s) can be specified by the local and remote port, and the remote address. All fields are optional, but commas in front of missing fields must be present:
[lcl_port][,[rmt_host][,[rmt_port]]]
Either symbolic or numeric values can be used for IP addresses and port numbers.
fuser outputs only the PIDs to stdout, everything else is sent to stderr.
root@dell:~# fuser -nv tcp 25
USER PID ACCESS COMMAND
25/tcp: root 3926 F…. master
FILES
/proc location of the proc file system
EXAMPLES
fuser -km /home kills all processes accessing the file system /home in any way.
if fuser -s /dev/ttyS1; then :; else something; fi invokes something if no other process
is using /dev/ttyS1.
fuser telnet/tcp shows all processes at the (local) TELNET port.
How to track which site is using the apache processes.
For apache 1.3, edit your /etc/httpd/conf/httpd.conf and add
ExtendedStatus On
<Location /httpd-status>
SetHandler server-status
</Location>
just after the code that says “ServerSignature On”. Save, exit, then restart apache. You can access the stats page by going to http://192.168.1.1/httpd-status where 192.168.1.1 is your server’s IP.
If you’re running apache 2.x with custombuild, then it’s already in the file:
/etc/httpd/conf/extra/httpd-info.conf
Change the “Allow from” lines to include your IP, or remove the line completely to allow from all.
Source : http://directadmin.com/
How can I see all running processes from the shell ?
Use either:
