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.
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
We need to look at the CPUs on the system. That information is stored in
catthat file, we notice we only have one CPU so we can just use
head -5to get the relevant information.
To do this, run:
head -5 /proc/cpuinfo > /tmp/cpus
If 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
- Gather the Logs
Get the format for today’s date:
Copy and paste the date.
Run the following, and output it to the terminal to make sure it looks right:
grep "<DATE> " /var/log/messages
Once we verify it looks right, run:
grep "<DATE> " /var/log/messages > /tmp/logs
- Find Out How Many Users Are on the System
/etc/passwdcontains all the users on the system, we just need to count how many lines are in that file. Fortunately, the
wccommand will do that for us.
wc -l /etc/passwd > /tmp/usernum