On Fri, Nov 23, 2018 at 09:45:50PM -0500, Steve Litt wrote:

[cut]

>
> What I hear in the preceding paragraph is that dpkg considers /
> and /usr a package deal (no pun intended), and so can't abide an NFS
> mounted /usr. Telling people to merge / and /usr for this reason is
> fixing the symptom and letting the root cause remain. That's usually
> not a good idea, but perhaps in this case fixing dpkg would be too
> difficult...
>

Dear Steve,

I don't understand what you mean by "fixing" dpkg. Please have a look:

# ldd /sbin/mount.nfs | grep "/usr"
        libgssapi_krb5.so.2 => /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007f82f53ac000)
        libkrb5.so.3 => /usr/lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007f82f52cf000)
        libk5crypto.so.3 => /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007f82f529b000)
        libkrb5support.so.0 => /usr/lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007f82f4fd1000)

# ldd /sbin/lvscan | grep "/usr"
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007fde00702000)

# ldd /sbin/lvs | grep "/usr"
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007fd3b7fa1000)

# ldd /sbin/sysctl | grep "/usr"
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f3ab7b18000)

# ldd /sbin/gdisk | grep "/usr"
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f7ddf10f000)

# ldd /bin/kill | grep "/usr"
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f9f6aa4a000)

# ldd /bin/ps | grep "/usr"
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 (0x00007fd7f6ebc000)

# ldd /bin/efibootmgr | grep "/usr"
        libefivar.so.1 => /usr/lib/x86_64-linux-gnu/libefivar.so.1 (0x00007f7ed22bd000)
    libefiboot.so.1 => /usr/lib/x86_64-linux-gnu/libefiboot.so.1 (0x00007f7ed20b0000)

Most of the utilities you would need to debug a problem in mounting a
/usr over NFS, or a failing lvm volume, or a scrambled efi partition
(some of the use cases somebody mentioned before) need stuff in
/usr.

HND

KatolaZ

-- 
[ ~.,_  Enzo Nicosia aka KatolaZ - Devuan -- Freaknet Medialab  ]  
[     "+.  katolaz [at] freaknet.org --- katolaz [at] yahoo.it  ]
[       @)   http://kalos.mine.nu ---  Devuan GNU + Linux User  ]
[     @@)  http://maths.qmul.ac.uk/~vnicosia --  GPG: 0B5F062F  ] 
[ (@@@)  Twitter: @KatolaZ - skype: katolaz -- github: KatolaZ  ]