Scenario

A Linux server is under review for stability and recent performance evaluation.

Task

Use the uptime command to determine how long the server has been running and extract the 15-minute load average as a floating-point number (e.g., 0.45). Save the uptime to /home/devops/uptime.txt and the 15-minute load average to /home/devops/loadavg.txt.

Example

Contents of `/home/devops/uptime.txt`: `2 days, 5:37`

Contents of `/home/devops/loadavg.txt`: `0.45`

Step 1:
Use the uptime command to view how long the system has been running and its load averages:

uptime

Example output:

11:32:15 up 2 days,  5:37,  2 users,  load average: 0.12, 0.32, 0.45

From this, the uptime portion up 2 days, 5:37 shows how long the server has been running.

Step 2:
Save that part to the uptime file via directly copy pasting it from the terminal

#replace "2 days, 5:37" with the output obtained from the previous step.
echo "2 days, 5:37" > /home/devops/uptime.txt

or you can use the command below:

uptime | awk -F'up ' '{print $2}' | awk -F',' '{print $1", "$2}' | tr -s ' ' > /home/devops/uptime.txt

Step 3:
Extract the 15-minute load average, which is the third value in the load average list (e.g 0.45), and save it to another file:

#repalce 0.45 to the value obtained in the first step.
echo "0.45" > /home/devops/loadavg.txt

Or

uptime | awk -F'load average: ' '{print $2}' | awk -F',' '{print $3}' | tr -d ' ' > /home/devops/loadavg.txt