LINUX-Frequently used commands
| df command Aggregate and display the size of free disk space. |
| Ｓyntax |
| df [Option] [Device file name] |
| The df command displays disk information such as total space, used space, free space, and utilization for each partition of the hard disk called the file system. The df command displays disk information such as total capacity, used capacity, free space, and usage rate for each partition of the hard disk called the file system. If the device file name of the file system (a file under /dev) is specified as an argument of the df command, only information about that file system will be displayed. If you specify the device file name of the file system (files under /dev) as the argument of the df command, only the information about that file system will be displayed. |
| Frequently used options |
| -h Display in readable units according to size. -h Display in easy-to-read units. However, use a value in units of 1000 instead of 1024. -B <size> Display in multiples of the specified size. The size can be specified as a number or a unit. -k Displays the capacity in kilobytes. -m Display capacity in megabytes. -i Display i-node information instead of block usagee |
| Example: Display the disk space. |
| $ df Filesystem 1K-Block Use Usable Use% Mount Position /dev/sda1 102175132 3491340 93493616 4% / ttmpfs 960376 0 960376 0% /dev/shm tmpfs 960376 0 960376 0% /var/cache/nginx |
| Example: Display the capacity in the appropriate units. |
| $ df -h Filesystem Size Used Avail Use% Mounted Position /dev/sda1 102175132 3491340 93493616 4% / tmpfs 960376 0 960376 0% /dev/shm tmpfs 960376 0 960376 0% /var/cache/nginx |
| Example: Display capacity in easy-to-read units. |
| $ df -H Filesystem Size Used Avail Capacity Mounted on /dev/ad0s1a 38G 17G 19G 47% / devfs 1.0K 1.0K 0B 100% /dev procfs 4.1K 4.1K 0B 100% /proc linprocfs 4.1K 4.1K 0B 100% /usr/compat/linux/proc |