Linux Terminal - System Information
The following are some commands to print information about the system.
- uptime - how long since last system reboot
- df - information about disk free space
- whomi - which user is currently logged in on the terminal
- hostname - what computer are you currently running commands on
- pwd - which directory are you inside of
- clear - clear the terminal screen
Here is an example session from running on the CS server using all of these commands. Note that the part "cs299@cs:~>" is a prompt that is printed by the terminal, and the part after this is what was typed by the user. So for the first command, the user typed the command uptime and then pressed enter. The system then printed some information on the next line, and then printed the prompt "cs299@cs:~>" again to indicate it is ready for the next command.
You should login to one of the CS systems, open up the terminal, and try out these commands as well. If you get an error, check that you are typing the commands exactly as they are given here.
cs299@cs:~> uptime 09:00:45 up 56 days, 19:35, 3 users, load average: 0.32, 0.31, 0.32 cs299@cs:~> df -h Filesystem Size Used Avail Use% Mounted on /dev/root 1016G 229G 778G 23% / devtmpfs 498G 0 498G 0% /dev tmpfs 32M 2.3M 30M 8% /run tmpfs 498G 8.0K 498G 1% /dev/shm cgroup_root 8.0M 0 8.0M 0% /sys/fs/cgroup /dev/sda2 127G 22G 105G 17% /usr /dev/sda3 127G 8.3G 118G 7% /var /dev/sda4 64G 13G 51G 20% /tmp /dev/sda5 10T 2.8T 7.2T 28% /u1 /dev/sda6 4.0T 685G 3.3T 18% /net /dev/sda7 18T 6.9T 11T 40% /store cs299@cs:~> whoami cs299 cs299@cs:~> hostname cs.indstate.edu cs299@cs:~> pwd /u1/class/cs299