On 11/10/2019 20:56, Paul Eggert wrote:
On 10/11/19 11:20 AM, Pádraig Brady wrote:
if you want to exclude nested file systems like that,
you could try:
alias df='df -x squashfs'
On my Fedora 30 workstation that option doesn't make any difference.
Regardless of whether '-x squashfs' is used, I see this output from 'df':
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 4065704 0 4065704 0% /dev
tmpfs 4081560 36616 4044944 1% /dev/shm
tmpfs 4081560 1696 4079864 1% /run
tmpfs 4081560 0 4081560 0% /sys/fs/cgroup
/dev/sda5 59614116 16910684 39645412 30% /
tmpfs 4081560 124 4081436 1% /tmp
/dev/sda2 1849433716 207781976 1547682948 12% /home
/dev/sda1 5095040 244468 4572044 6% /boot
tmpfs 816312 60 816252 1% /run/user/1000
and most of these lines are useless.
For many years we've put up with the problem of too many filesystems in
the default plain 'df' output, and now's as good a time as any to fix
that. On my workstation there should be only four lines of information,
one each for /, /home, /boot, and the shared tmpfs area.
Presumably readonly filesystems should also be omitted by default, since
they're not something people ordinarily care about.
We can add a flag or two for the rare people who want to see these
normally-useless lines.
What df tries to show now is a deduplicated list of file systems
that have consumable storage. Maybe read-only could be valid to drop
by default, but I've worked on systems where certain file-systems
were read-only most of the time, but they were consumable.
I wonder could we key (also) on used==0||available==0.
cheers,
Pádraig
