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We have many directories on a server. These directories were created as soft-link and linked it with some NFS share. I would like to list the soft link directories which linked with NFS shares.

we used the commands below to create soft-link directory and link with NFS.

client 1 # ln -s /net/rchserver01/data/share2/ /tmp/
client 1 # ln -s /net/rchserver01/data/share1/ /var/
client 1 # ll /tmp/
lrwxrwxrwx 1 root     root  27 Sep 13 11:38 share2 -> /net/rchserver01/data/share2/
client 1 # ll /var/
lrwxrwxrwx 1 root     root  27 Sep 13 11:38 share2 -> /net/rchserver01/data/share1/
  • Are all the NFS shares under /net? Just wondering what assumptions we can make. – Jeff Schaller Sep 13 '18 at 17:23
  • Yes, using mount command I can see the NFS servers. But I need to know the softlink directories where these NFS mounted. – Pandu Sep 13 '18 at 17:25
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Given the sample input:

find /tmp -lname '/net/*'

More generally, tell find to explore every local filesystem, but to stay on each filesystem:

find $(lsblk --list --noheadings --output MOUNTPOINT | grep /) -xdev -lname '/net/*'

Even more generally, ask find to search the local filesystems, as above, but build up a list of possible NFS targets:

readarray -t nfsmounts < <(awk '$3 ~ /^nfs/ { print $2 }' < /proc/mounts)
excludes=()
excludes+=("(")
excludes+=(" -lname ${nfsmounts[0]}")
for((i=1;i < ${#nfsmounts[@]}; i++))
do
  excludes+=( " -o -lname '${nfsmounts[i]}/*'")
done
excludes+=(")")
find $(lsblk --list --noheadings --output MOUNTPOINT | grep /) -xdev ${excludes[@]}

Another alternative for the starting list of filesystems: parse /proc/filesystems for filesystem types that are not nodev:

find $( for type in $(awk '$1 != "nodev"' /proc/filesystems); do mount -l -t "$type" | awk '{print $3}'; done ) \
  -xdev -lname '/net/*'
  • Thanks a lot !! It worked. But I need to run find command for all filesystems to find the softlink dirs. Since I would not know where my softlink dir exists. – Pandu Sep 13 '18 at 17:33
  • Run the find with all your local filesystems, and add -xdev; looking to see if we have a good "local filesystems" answer here... stole one of my own – Jeff Schaller Sep 13 '18 at 17:35
  • @JeffSchaller Maybe find / -type nfs -prune -lname '/net/*' This should not descend into any NFS file systems. – doneal24 Sep 13 '18 at 17:48
  • Aye, @Doug, but there's also tmpfs and sysfs and devpts and autofs and ... – Jeff Schaller Sep 13 '18 at 17:53
  • Maybe something more along the lines of mount -l -t (each of -- awk '$1 != "nodev"' /proc/filesystems) – Jeff Schaller Sep 13 '18 at 17:55

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