Filing System functions

• Create : Allocate space and enter name+location into directory
• Delete : Deallocate space, invalidate+remove directory entry
• Open : Search directory for file, check access permissions, set pointers to file
• Close : Remove pointers to file
• Read : Access file and update current position pointers
• Write : Access file and update pointers
• Reposition : Set current position to a specific (new) value
• Truncate : Erase contents, but maintain other attributes

Run the command on unix df -a :

Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/c0t1d0s0     146967   57801   74476    44%    /
/dev/dsk/c0t1d0s6     105039   82418   12121    88%    /usr
/proc                      0       0       0     0%    /proc
fd                         0       0       0     0%    /dev/fd
/dev/dsk/c0t1d0s4     106047   32236   63211    34%    /var
/dev/dsk/c0t1d0s3     139895  110284   15631    88%    /usr/openwin
swap                  196800    8748  188052     5%    /tmp
auto_home                  0       0       0     0%    /home
auto_nfs                   0       0       0     0%    /nfs
sentinel:vold(pid538)  146967   57801   74476    44%    /vol