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

RegexLinuxShellRedhat

Regex Problem Overview

How to get only the process ID for a specified process name in linux?

ps -ef|grep java    
test 31372 31265  0 13:41 pts/1    00:00:00 grep java

Based on the process id I will write some logic. So how do I get only the process id for a specific process name.

Sample program:

PIDS= ps -ef|grep java
if [ -z "$PIDS" ]; then
echo "nothing"
else
mail test@domain.com
fi

Regex Solutions

Solution 1 - Regex

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

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

Solution 2 - Regex

You can use:

ps -ef | grep '[j]ava'

Or if pgrep is available then better to use:

pgrep -f java

Solution 3 - Regex

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

Solution 4 - Regex

This command ignore grep process, and just return PID:

ps -ef | grep -v grep | grep java | awk '{print $2}'

Solution 5 - Regex

why not just pidof ?

pidof <process_name>

it will return a list of pids matching the process name

https://linux.die.net/man/8/pidof

Categories
Recommended Regex Solutions
Recommended Linux Solutions
Recommended Shell Solutions
Recommended Redhat Solutions

Previous Solution:

Qt Designer vs Qt Quick Designer vs Qt Creator?

QtQmlQt CreatorQt DesignerQt Quick

Next Solution:

How to debug javascript promises?

JavascriptPromiseEs6 Promise

Attributions

All content for this solution is sourced from the original question on Stackoverflow.

The content on this page is licensed under the Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionopenquestionView Question on Stackoverflow
Solution 1 - RegexJose VarezView Answer on Stackoverflow
Solution 2 - RegexanubhavaView Answer on Stackoverflow
Solution 3 - RegexventsyvView Answer on Stackoverflow
Solution 4 - RegexNabi K.A.Z.View Answer on Stackoverflow
Solution 5 - RegexPorungaView Answer on Stackoverflow