Archive for the ‘Linux Tips’ Category
Linux Tip #4: Simple sort with the sort command
You can easily sort your outputs in Linux using the “sort” command. Simply pipe “|” your output to a “sort” command and you should see the sorted results. See sample usage below. This is just to start off, I’ve cover more in future posts. [root@hantu ~]# cat numbers 5 4 3 2 1 0 6 [...]
Linux Tip #3: System uptime with uptime
Want to know how long your Linux box has been up for? Simple, just run the “uptime” command and you will be rewarded with the answer plus a bit more. 8:58pm up 19:54, 1 user, load average: 0.47, 0.62, 0.35 Above is the typical reply from uptime. On the left is the current time, followed [...]
Linux Tip #2: Get your PID with $$
“$$” is a useful Linux variable you could use in your script to get it’s PID. The “$$” variable always holds the PID of the executing process. Why do you need it? Maybe to check if the script is already running? This is what I normally use it for. Sample Script; #!/bin/bash echo “My PID [...]
Linux Tip #1: Live monitoring with tail
This is something every Linux admin or Linux superuser probably already knows and uses everyday. The “tail -f” command monitors a file and tracks any changes to it. As changes are made to the monitored file the “tail” command will print them on screen. Live monitoring basically….. tail -f [log file] Sample output; [root@keke ~]# [...]
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