As a system administrator, you always want to make sure that you have enough space for your hosts to run. Luckily for you, there are plenty of commands that you can use in order to check disk space on Linux. Checking disk space is essential : if you don???t monitor it, you may be unable to connect to your host or to perform any commands on it. As a consequence, we are going to see how you can check your disk space, but also how you can monitor it in order to make sure you are not too late.