Taking care about disk usage is a very good habit. There are several options for this and now I will only describe df and du commands.
The df utility displays the disk space usage on all mounted filesystems.
[root@abc ~]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
35772016 20297132 13628408 60% /
/dev/sda1 101086 17692 78175 19% /boot
tmpfs 513044 0 513044 0% /dev/shm |
Adding the -T option (type) will print the filesystem type. Also, the good idea is to add -h option because df measures the size in 1K blocks, which is difficult for a desktop user to recalculate.
Now we have
[root@abc ~]# df -h -T
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
ext3 35G 20G 13G 60% /
/dev/sda1 ext3 99M 18M 77M 19% /boot
tmpfs tmpfs 502M 0 502M 0% /dev/shm |
As you can see, it is much easier to understand.
You can use the du command to determine which files or directories need to be deleted or reduced. A simple du will print usage for the present working directory and its subdirectories, along with the size of each directory.
du directory will print the size of an particular dir.
Avilable options:
-h – print the size of the podcasts directory in a more readable format
-c – prints the grand total size of the directory at the end.
-a – displays the file names along with directories
-s – display a summary, without showing all of the subdirectories.
For example, du -ch | grep total prints just one line with the total size of the directory.