How to get only process ID in specify process name in linux?

You can pipe your output to awk to print just the PID. For example:

ps -ef | grep nginx | awk '{print $2}'9439

regex linux shell redhat

You can use:

ps -ef | grep '[j]ava'

Or if pgrep is available then better to use:

pgrep -f java

regex linux shell redhat

Use this: ps -C <name> -o pid=

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