System Info
- w ------------------------>> Display who is on line
- whoami ------------------------>> Who you are logged in as
- who ------------------------>> Who are currently logged in
- pwd ------------------------>> Present working directory
- finger user ------------------------>> Display information about user
- uname -a ------------------------>> Show kernel information
- cat /proc/cpuinfo ------------------------>> Cpu information
- cat proc/meminfo ------------------------>> Memory information
- man command------------------------>> Show the manual for command
- df ------------------------>> Show the disk usage
- du ------------------------>> Show directory space usage
- free ------------------------>> Show memory and swap usage
- whereis app ------------------------>> Show possible locations of app
- which app ------------------------>> Show which applications will be run by default
- date ------------------------>> Show the current date and time
- cal ------------------------>> Show this month's calender
- uptime ------------------------>> Show current uptime
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Examples
[haritaraka12078@cxln4 ~]$ date
Wed Jun 1 06:43:07 UTC 2022
Wed Jun 1 06:43:07 UTC 2022
[haritaraka12078@cxln4 ~]$ date "+%m/%d/%y"
06/01/22
[haritaraka12078@cxln4 ~]$ date "+%m/%d/%Y"
06/01/2022
[haritaraka12078@cxln4 ~]$ date "+%d/%m/%Y"
01/06/2022
[haritaraka12078@cxln4 ~]$ who am i
haritaraka12078 pts/9 2022-06-01 05:32 (43.228.94.14)
[haritaraka12078@cxln4 ~]$ cal
June 2022
Su Mo Tu We Th Fr Sa
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30
[haritaraka12078@cxln4 ~]$ cal 2 2022
February 2022
Su Mo Tu We Th Fr Sa
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28
[haritaraka12078@cxln4 ~]$ uptime
06:45:43 up 1 day, 14:27, 24 users, load average: 1.25, 1.34, 1.41
[haritaraka12078@cxln4 ~]$ w
lakshmid pts/4 04:47 1:58m 0.01s 0.01s -bash
tummabha pts/8 06:45 31.00s 0.01s 0.01s -bash
haritara pts/9 43.228.94.14 05:32 7.00s 0.13s 0.31s sshd: haritaraka12078 [priv]
