Slavko <email@example.com> wrote:
> Dňa 02.07.2013 23:32 John Hasler wrote / napísal(a):
>> Look at the access times. Dotfiles that have not been accessed in years
>> can probably be safely removed.
> Sure, but do not forget, that the "relatime" (default one) and "noatime"
> mount options are going into play, then the results can be inappropriate.
A filesystem mounted with "relatime" is pretty safe, as for each file
that's accessed, its access time is updated at least once a day. This
from the mount manpage (wheezy) in the section for relatime:
Access time is only updated if the previous access time was earlier
than the current modify or change time [...]
Since Linux 2.6.30, the kernel defaults to the behavior provided by
this option [...]. In addition, since Linux 2.6.30, the file's last
access time is always updated if it is more than 1 day old.
Given the OP is looking for "really old" files that haven't been accessed,
then the technique will still work on "relatime" filesystems.
A filesystem mounted with "noatime" can probably be switched to "relatime"
with little or no disadvantageous effect.