Knowing the different commands to look at and manipulate files is a required skill for new system administrators. This hands-on lab will allow you to use the different utilities for normal sysadmin work and learn through repetition.
**Note:** After the lab starts up, please wait a minute or so to give the instance time to spin up before connecting via SSH.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Find Out How Many and What Type of CPUs Are on the System
Note: After the lab starts up, please wait a minute or so to give the instance time to spin up before connecting via SSH.
Once you ssh in, become
rootwith:sudo -iWe need to look at the CPUs on the system. That information is stored in
/proc/cpuinfo.If we
catthat file, we notice we only have one CPU so we can just usehead -5to get the relevant information.To do this, run:
head -5 /proc/cpuinfo > /tmp/cpusIf we had more than one CPU, we could use
grep -A 4 processor /proc/cpuinfoto get information about all of them. The-Aflag tells grep to print four lines after it matches, and we’re looking for "processor", which is the first line of the/proc/cpuinfofile.- Gather the Logs
Get the format for today’s date:
tail /var/log/messagesCopy and paste the date.
Run the following, and output it to the terminal to make sure it looks right:
grep "<DATE> " /var/log/messagesOnce we verify it looks right, run:
grep "<DATE> " /var/log/messages > /tmp/logs
- Find Out How Many Users Are on the System
Since
/etc/passwdcontains all the users on the system, we just need to count how many lines are in that file. Fortunately, thewccommand will do that for us.Run:
wc -l /etc/passwd > /tmp/usernum
