LinuxCommands

Overview

This article describes several linux user space commands that can be useful for doing several tasks

System Information

1. arch: Show the machine arch.
2. uname -m: Show machine arch.

[jdoe@localhost ~]$ arch x86_64 [jdoe@localhost ~]$ uname -m x86_64

1. uname -r: Show the kernel version.
2. cat /proc/version: Show kernel version (extra information).

[jdoe@localhost ~]$ uname -r 3.11.10-301.fc20.x86_64 [jdoe@localhost ~]$ cat /proc/version  Linux version 3.11.10-301.fc20.x86_64 (mockbuild@bkernel01.phx2.fedoraproject.org) (gcc version 4.8.2 20131017 (Red Hat 4.8.2-1) (GCC) ) #1 SMP Thu Dec 5 14:01:17 UTC 2013

1. dmidecode -q: Show the system hardware information.
2. hdparm -i /dev/hda: Show harddisk information.
3. hdparm -tT /dev/sda: Do a read test.
4. cat /proc/cpuinfo: Show CPU information.
5. cat /proc/interrupts: Show IRQ information.
6. cat /proc/meminfo: Show Memory status.
7. cat /proc/swaps: Show swap files.
   
8. cat /proc/net/dev: Show Network adapters and statistics.
9. cat /proc/mounts: Show mounted volumes in the system.
10. lspci -tv: Show PCI devices.
11. lsusb -tv: Show USB devices.
12. date: Show the system date.
13. cal 2014: Show calendar <cal + year>
14. cal 07 2014: Show month.
15. date 041217002011.00: set date (set, adjust) date y hour.
16. clock -w: Save date changes in BIOS.

[jdoe@localhost ~]$ arch x86_64 [jdoe@localhost ~]$ uname -m x86_64