To view the filesystems currently mounted on a Linux system, you can use the mount command. This will display a list of all the filesystems that are currently mounted, along with their type and mount point. For example:
$ mount /dev/sda1 on / type ext4 (rw,relatime,errors=remount-ro) tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) devtmpfs on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=549980,mode=755) ...
You can also use the df command to view information about the available disk space on each mounted filesystem. The df command displays the filesystem name, the total size of the filesystem, the amount of space used, and the available space:
$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 9.8G 6.3G 3.1G 67% / tmpfs 1.9G 0 1.9G 0% /run devtmpfs 2.0G 0 2.0G 0% /dev ...
To view more detailed information about a specific filesystem, you can use the stat command. For example:
$ stat -f /dev/sda1 File: "/dev/sda1" ID: 0 Namelength: 255 Type: ext4 Block size: 4096 Fundamental block size: 4096 Blocks: Total: 24419096 Free: 9156962 Available: 7636462 Inodes: Total: 61440 Free: 61138
You can also use the lsblk command to view information about block devices on the system, including their size, type, and mount point. For example:
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 9.8G 0 disk ├─sda1 8:1 0 9.8G 0 part / ├─sda2 8:2 0 1K 0 part └─sda5 8:5 0 9.8G 0 part sdb 8:16 0 20G 0 disk └─sdb1 8:17 0 20G 0 part /mnt/external