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Friday, 19 February 2010 12:44 |
Command pstree
Displays all running processes in a tree.
Syntax
pstree [options] [process_id]
Options
-a displays the command line arguments.
-c does not compress the subtrees.
-l displays a long line.
-n sorts the processes by their identifiers (and not by name).
-p displays the process IDs.
Description
Pstree command displays all the processes in the form of a tree - so it's easier to see the relationship precedence processes.
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Friday, 19 February 2010 12:37 |
Command ps
Displays the status of processes (programs) running in the system.
Syntax
ps [options]
Options
Note that unlike other commands ps command options do not have a prefix "-".
a display processes of other users.
f displays a tree of processes.
j displays the output using the format jobs.
l displays the data in long format, with detailed information about each process. m displays information about memory usage of each process.
u displays the user name and start time.
x displays processes that are not associated with any terminal.
Description
The ps command displays the status of processes running on the system. The ps command without parameters to generate a list of processes you run. To view a list of all processes running on the system, type ps ax (or ps aux, if you want more information for each process).
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Wednesday, 16 December 2009 17:17 |
Command killall
killall command kills all active processes.
Syntax
killall [options]
Options
view option kill command
Description
Command killall kills all active processes. Implied value send a signal equal to 9 (signal destruction).
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Wednesday, 16 December 2009 17:07 |
Command - kill
Kill command sends a signal to the process.
Syntax
kill [options] id_process
Options
-Nsignal sends a specified signal (where Nsignal - the number or name).
-l displays the number and names of signals.
Description
The kill command sends a signal to the process. The signal default kill signal is TERM Usually this signal is designed to complete the process. For example, kill -9 123 terminates the process with ID 123. To view identifiers processes use the command ps. To view a list of names and number of signals type signal kill -l.
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Monday, 14 December 2009 19:22 |
Command free
free command displays the number of free and used memory in the system.
Syntax
free [options]
Options
-b displays the amount of memory in bytes.
-k displays the memory size in kilobytes (default).
-m displays the amount of memory in megabytes.
-sn command repeats every n seconds.
-t displays the string with the total number of free and used memory.
Description
The free command displays information about the physical memory (RAM) and swap space (on disk). In the output information shows the total amount of memory, as well as the number used and free memory.
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