Fixing broken links

[Luis Paulo]

I was doing some tests to list broken links and file system loops (I know
that you already have, bare with me):
 $ sudo find -L . -type l -exec ls -l '{}' \; > ~/broken.txt

Then I run it on my root and, surprise, I had a few hundred bad links too.
When I cancel the command I had already a 33Mb text file.

As I notice /proc on the screen, I removed that directory from the results.
Then I removed /sys, /run and /var/run.

Then I removed from the results a /usr/share/help and some obvious old and
temp backups dirs in my home, and I ended up just with a few bad links.

So I'm just asking if your situation may be kind of similar, or it is in
fact the enormity of (real) bad links. That's some hope, isn't it?

Also the above command plus ' 2> ~/loops.txt' at the end will list file
system loops at ~/loops,txt,





On Wed, Feb 17, 2016 at 12:47 AM, Ralf Mardorf <silver.bullet at zoho.com>
wrote:

> On Tue, 16 Feb 2016 14:16:35 -0800, rikona wrote:
> >I reorganize my disks and that breaks links.
>
> You seemingly disorganised your disk ;).
>
> >Is there a GUI tool
>
> I don't know. You likely found hints how to use command line.
>
>
> http://unix.stackexchange.com/questions/34248/how-can-i-find-broken-symlinks
>
> [rocketmouse at archlinux Desktop]$ ls -Gg *
> -rw-r--r-- 1    0 Feb 17 00:28 a
> -rw-r--r-- 1    0 Feb 17 00:28 b
> lrwxrwxrwx 1    1 Feb 17 00:29 c -> b
> lrwxrwxrwx 1    1 Feb 17 00:29 d -> e
> lrwxrwxrwx 1    1 Feb 17 00:30 f -> g
> lrwxrwxrwx 1    1 Feb 17 00:30 g -> f
> lrwxrwxrwx 1   15 Feb 17 01:27 me_myself_and_i -> me_myself_and_i
> lrwxrwxrwx 1   11 Feb 17 00:50 z -> directory_1
>
> directory:
> total 0
> -rw-r--r-- 1 0 Feb 17 00:33 a
> -rw-r--r-- 1 0 Feb 17 00:33 b
> lrwxrwxrwx 1 1 Feb 17 00:34 c -> b
> lrwxrwxrwx 1 1 Feb 17 00:34 d -> e
> lrwxrwxrwx 1 1 Feb 17 00:34 f -> g
> lrwxrwxrwx 1 1 Feb 17 00:34 g -> f
>
> directory_2:
> total 0
> [rocketmouse at archlinux Desktop]$ echo; for l in $(find . -type l); do cd
> $(dirname $l); if [ ! -e "$(readlink $(basename $l))" ]; then echo -n "$l
> -> "; fi; cd - > /dev/null; if [ ! -e "$(readlink $(basename $l))" ]; then
> readlink $l; fi; done
>
> ./f -> g
> ./z -> directory_1
> ./directory/f -> g
> ./directory/d -> e
> ./directory/g -> f
> ./d -> e
> ./me_myself_and_i -> me_myself_and_i
> ./g -> f
>
> So you get a list of all broken links, but it's also possible to
> e.g. find all links against "directory_1" and to change those links to
> link against e.g. "directory_2" instead of linking against
> "directory_1", but I wouldn't do this. You also could sort and compare
> to find circular links, but while this might be easy to solve for
> "1 -> 2" vs "2 -> 1" and easier for "me_myself_and_i -> me_myself_and_i",
> it becomes tricky when the loops are caused by a chain of links.
>
> I would be careful with using a script or a GUI tool that automatically
> reorganizes links.
>
> Assumed you used links against /mnt/old/foo and now there
> isn't /mnt/old/ anymore, now the links should be against /mnt/new/foo,
> then I wouldn't change all links, I would create a link
> /mnt/old -> /mnt/new/.
>
>
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