command: top
purpose: display Linux tasks.It can display system summary information
as well as a list of tasks currently being managed by
the
Linux kernel
syntax: top -hv | -bcHisS -d -n -p
-b batchmode
-c command line/program name
-d delay time interval
-h help
-H threads toggle
-i idle processes
-n number of iterations
-u monitor by user
-U monitor by user with UID
-p monitor PID
-s secure mode operation
-S cumulative time mode
-v version
examples:
1. $top
display information like tasks, memory, cpu, and swap press q to quit
2. to display specific user process
$top -u username
3. when top is running Press (Shift+O) to Sort field via field letter, for
example press ?a? letter to sort process with PID (Process ID)
4. Press ?z? option in running top command will display running process
in color which may help you to identified running process easily
5. Top output keep refreshing until we press ?q?. With below command top
command will automatically exit after 10 number of repetition.
$top -n 10
6. top -h to obtain top command help
$top -h
7. to save top command results
$top shift+w
regards,
dhanasekar
