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What does the pstree command do in Linux?
Pstree command in Linux that shows the running processes as a tree which is a more convenient way to display the processes hierarchy and makes the output more visually appealing. The root of the tree is either init or the process with the given pid.
Which is the parent process of the pstree tree?
The tree shows processes in a hierarchical manner. ‘ systemd ‘ is the parent process for all other system processes. pstree visually merges identical branches by putting them in square brackets and prefixing them with the repetition count. You can also display the output without merging the identical branches together.
How do you show PIDs in pstree command?
To display PIDs for each process name, we use “-p” option. 4. To force pstree to expand identical subtrees in output. By default, the pstree command merges identical branches by putting them in square brackets and prefixing them with the repetition count.
How to merge identical branches in pstree command?
By default, the pstree command merges identical branches by putting them in square brackets and prefixing them with the repetition count. But we can also force the tool to expand identical trees, by using the “-c” command-line option. 5. To sort processes
How to force pstree to expand identical trees?
To force pstree to expand identical subtrees in output. By default, the pstree command merges identical branches by putting them in square brackets and prefixing them with the repetition count. But we can also force the tool to expand identical trees, by using the “-c” command-line option.
How to substitute the output of a grep in Bash?
Check command substitution in the bash man page. You can you back ticks “ or $ () , and personally I prefer the latter. will substitute the output of whoami as the argument for the -e flag of the grep command and the output of the whole command will be line number in /etc/passwd of the running user.