atop -VERSION (return code: 0)
Version: 2.2.6 - 2016/12/22 00:00:00 <email@example.com>
atop --help (return code: 1)
atop: invalid option -- '-' Usage: atop [-flags] [interval [samples]] or Usage: atop -w file [-S] [-a] [interval [samples]] atop -r [file] [-b hh:mm] [-e hh:mm] [-flags] generic flags: -V show version information -a show or log all processes (i.s.o. active processes only) -R calculate proportional set size (PSS) per process -P generate parseable output for specified label(s) -L alternate line length (default 80) in case of non-screen output -f show fixed number of lines with system statistics -F suppress sorting of system resources -G suppress exited processes in output -l show limited number of lines for certain resources -y show individual threads -1 show average-per-second i.s.o. total values -x no colors in case of high occupation -g show general process-info (default) -m show memory-related process-info -d show disk-related process-info -n show network-related process-info -s show scheduling-related process-info -v show various process-info (ppid, user/group, date/time) -c show command line per process -o show own defined process-info -u show cumulated process-info per user -p show cumulated process-info per program (i.e. same name) -C sort processes in order of cpu-consumption (default) -M sort processes in order of memory-consumption -D sort processes in order of disk-activity -N sort processes in order of network-activity -A sort processes in order of most active resource (auto mode) specific flags for raw logfiles: -w write raw data to file (compressed) -r read raw data from file (compressed) special file: y[y...] for yesterday (repeated) -S finish atop automatically before midnight (i.s.o. #samples) -b begin showing data from specified time -e finish showing data after specified time interval: number of seconds (minimum 0) samples: number of intervals (minimum 1) If the interval-value is zero, a new sample can be forced manually by sending signal USR1 (kill -USR1 pid_atop) or with the keystroke 't' in interactive mode. Please refer to the man-page of 'atop' for more details.