top -c command in linux to filter processes listed based on processname

Using pgrep to get pid's of matching command lines:

top -c -p $(pgrep -d',' -f string_to_match_in_cmd_line)

top -p expects a comma separated list of pids so we use -d',' in pgrep. The -f flag in pgrep makes it match the command line instead of program name.

It can be done interactively

After running top -c , hit o and write a filter on a column, e.g. to show rows where COMMAND column contains the string foo, write COMMAND=foo

If you just want some basic output this might be enough:

top -bc |grep name_of_process