CentOS Linux Server Guide

CentOS Linux System Information - System Uptime

ps

This command reports information about a selection of the active processes.
Different from top command, which give you the information in real time; ps command only give you the information at particular snapshot.

Synopsis

vmstat [options]

options description

-A or -e display all processes

a lists all processes on a terminal, including those of other user

u adding a column for owner of the process.

x lists all processes without controlling terminals

Note

uptime -V is used to displayed version of uptime

Example

# ps aux

SER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.1 2424 552 ? S Apr28 0:01 init [5]
root 2 0.0 0.0 0 0 ? S Apr28 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Apr28 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S< Apr28 0:00 [events/0]
root 5 0.0 0.0 0 0 ? S< Apr28 0:00 [khelper]
root 6 0.0 0.0 0 0 ? S< Apr28 0:00 [kacpid]
root 87 0.0 0.0 0 0 ? S< Apr28 0:00 [kblockd/0]
root 88 0.0 0.0 0 0 ? S Apr28 0:00 [khubd]
root 105 0.0 0.0 0 0 ? S Apr28 0:00 [pdflush]
root 106 0.0 0.0 0 0 ? S Apr28 0:00 [pdflush]

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