linux ps command to list number of running processes in super user root

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Problem :

I am looking for. a command that I can list the number of running processes by superuser root and pipe it to wc -l

i already did ps -ef | grep ^$USER wc -l however that only shows for the current user

Solution :

To display all root processes use:

sudo ps -U root -u root -o comm= | wc -l


  • -U : select real user ID

  • -u : select effective user ID

  • -o comm= : select no columns, so the header line will not be output.

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