| pstree |
Processes and parent-child relationships |
| top |
Show top processes |
| iostat |
Report CPU statistics and input/output statistics for devices and partitions. |
| ps -auxw |
process status |
| uname -a |
print system information |
| cat /proc/version |
Display Linux kernel version in use. |
| cat /etc/redhat-release |
Display Red Hat Linux Release. (also
/etc/issue) |
| uptime |
Tell how long the system has been running. Also number of users and system's load average. |
| w |
Show who is logged on and what they are doing. |
| /sbin/lsmod |
List all currently loaded kernel modules.
Same as
cat /proc/modules |
| /sbin/runlevel |
Displays the system's current runlevel. |
| hostname |
Displays/changes the system's node name. (Must also manually change hostname setting in
/etc/sysconfig/network. Command will change entry in
/etc/hosts) |
| service |
Red Hat/Fedora command to display status of system services.
Example:
service --status-all
Help:
service --help |