To kick things off: check your disk space. If you don’t have enough room for new files or programs to install, that could be causing some issues. To do this, open up a terminal and type in “df -h”. This will show you how much space is available on each partition of your hard drive.

Next, let’s check our memory size. If we don’t have enough RAM, it can cause slow performance or even crashes. To see how much memory we have, use the command “free -h”. This will show us how much memory is currently in use and how much is available.

Now that we know about disk space and memory size, let’s check our system load. If there are too many processes running at once, it can cause slow performance or even crashes. To see what’s going on, type “top” into your terminal. This will show you a list of all the currently running processes and how much CPU time they’re using.

If we need to kill a process that’s causing problems, use the command “kill -9 “. Replace “” with the actual number for the process you want to stop. You can find this by typing “ps aux” into your terminal and looking at the fourth column (the one labeled “PID”).

Finally, let’s check our logs! If we’re having issues with a specific program or service, it might be helpful to look through its log files for any errors. To do this, use the command “tail -f /var/log/.log”. Replace “” with the actual name of the program you want to check (e.g. apache2). This will show us a live stream of the log file as it’s being written to, so we can see any errors or warnings in real time.

And that’s it! With these simple commands and tools, you should be able to troubleshoot most common issues on Linux. Remember: always check your disk space, memory size, system load, and logs before assuming something is broken.