How to get the PID from ps-ef?

How to get the PID from ps-ef?

I want to use ps -ef | grep “keyword” to determine the pid of a daemon process (there is a unique string in output of ps -ef in it). I can kill the process with pkill keyword is there any command that returns the pid instead of killing it? (pidof or pgrep doesnt work)

How to get the PID of a process?

-f The pattern is normally only matched against the process name. When -f is set, the full command line is used. Note the [] around the first letter of the keyword. That’s a useful trick to avoid matching the awk command itself. That command should give you the PID of the processes with KEYWORD in them.

What makes pgrep match keywords in the whole command line?

That makes pgrep match keywords in the whole command (including arguments) instead of just the process name. -f The pattern is normally only matched against the process name. When -f is set, the full command line is used. Note the [] around the first letter of the keyword.

How to get PID of running program in Linux?

Anyway, if for some reason you want to kill it with the kill command, there is the pidof command that gives you the pid of a running program. Thanks for contributing an answer to Unix & Linux Stack Exchange! Please be sure to answer the question. Provide details and share your research!

Why is iptables service failing in RHEL 7?

No translations currently exist. Proactively detect and remediate issues impacting your systems. Red Hat Enterprise Linux 7 (RHEL 7). iptables.service or ip6tables.service is failing when both the service are enabled in RHEL 7. iptables.service or ip6tables.service shows the error:

When did iptables service failed to start during firewall?

Aug 03 18:28:58 HOSTNAME iptables.init [549]: iptables: Applying firewall rules: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?

How to get the PID of a process in AWK?

That’s a useful trick to avoid matching the awk command itself. That command should give you the PID of the processes with KEYWORD in them. In this instance, awk is returning what is in the 2nd column from the output. This command should give you a PID number.

Why is the file F UGLY in pgrep?

Ugly because there will be a file f, but it’s not my fault that there is no syntax for sequential processes where you still want to use the output of a previously run process. The pgrep command, as others have stated, will return the PID (process ID) of processes based on name and other attributes.

How to do a blind search for PID?

There’s a problem with doing a blind search for the PID (as opposed to checking column 1 with awk) is that you may pick up lines where that PID shows up in the command string. Instead of using grep you could use the -p option to pass the PID directly to the ps command.

How to do a search for PID in grep?

The -v switch for grep performs an inverted search, in other words you will get everything you DON’T want. After a variable is set, you should also reference it prefixed with $. You’re grepping the output of ps for all lines which do not contain the literal string “PID”.

How to disable column names in PS output?

Use the –no-headers to have the header line omitted. The man page for ps clearly documents this: man ps [snip] –no-headers Print no header line at all. –no-heading is an alias for this option. to get a list of PIDs without the header. See also man ps section ‘STANDARD FORMAT SPECIFIERS’ for possible colums.