Report space remaining on disk on unix login

I get a kick out of stuff like this. Add this to your .bash_profile to be greeted with the remaining space on your disk.

df -h | awk ‘NR==2 {print “Space available ” $4}’

This will actually change depending on which version of df you’re using (i think). I get different output on my Mac than I do on a CentOS machine – df seems to auto wrap lines on long drive names, so when I check the space on the CentOS server I need to change the line number (NR goes to 3) and the column to print (down to 3).

On my mac, this is what I get:

haddad:~ jhaddad$ df -h
Filesystem      Size   Used  Avail Capacity  Mounted on
/dev/disk0s2   149Gi  144Gi  4.9Gi    97%    /
devfs          106Ki  106Ki    0Bi   100%    /dev
fdesc          1.0Ki  1.0Ki    0Bi   100%    /dev
map -hosts       0Bi    0Bi    0Bi   100%    /net
map auto_home    0Bi    0Bi    0Bi   100%    /home

haddad:~ jhaddad$ df -h | awk 'NR==2 {print "Space available " $4}'
Space available 4.9Gi

I should probably clear some stuff off my drive.