Questions[backuppc](ubuntu)

Ubuntu 21.10

Upon upgrade backuppc failed.
I upgraded rsync_bpc 3.1.3.0 as requested by backuppc, the backuppc server starts (before did not) and run OK but backups fails with this code error:

Got fatal error during xfer (rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.3.0])
2021-10-26 15:02:57 Backup aborted (rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.3.0])

If I rsync server to remote there are no errors.

I know not many people use backuppc so I have no expectations someone to give a piece of advice but maybe somebody will have the same issue.

I have now installed:

root@zika:/home/brad# rsync_bpc --version
rsync_bpc  version 3.1.3.0  protocol version 31
Copyright (C) 1996-2018 by Andrew Tridgell, Wayne Davison, and others.
Web site: http://rsync.samba.org/
Capabilities:
    64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints,
    socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace,
    append, ACLs, xattrs, iconv, symtimes, no prealloc

rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you
are welcome to redistribute it under certain conditions.  See the GNU
General Public Licence for details.

and:

root@zika:/home/brad# rsync --version
    rsync  version 3.2.3  protocol version 31
    Copyright (C) 1996-2020 by Andrew Tridgell, Wayne Davison, and others.
    Web site: https://rsync.samba.org/
    Capabilities:
        64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints,
        socketpairs, hardlinks, hardlink-specials, symlinks, IPv6, atimes,
        batchfiles, inplace, append, ACLs, xattrs, optional protect-args, iconv,
        symtimes, prealloc, stop-at, no crtimes
    Optimizations:
        SIMD, no asm, openssl-crypto
    Checksum list:
        xxh128 xxh3 xxh64 (xxhash) md5 md4 none
    Compress list:
        zstd lz4 zlibx zlib none
    
    rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you
    are welcome to redistribute it under certain conditions.  See the GNU
    General Public Licence for details.

Thanks a lot!

Update: I solved this issue (dependency).

Ubuntu 18.04 LTS

BackupPC used to backup to an external USB drive which was mounted auto at boot. For some reasons now is not mounted and I did not change /etc/fstab

I changed /etc/default/grub to disable GUI, I mean to boot the in text mode and suddenly I encounter this error. Actually, there was no grub in /etc/default and I renamed /etc/default/grub.bak to /etc/default/grub.bak
Can grub have anything to do with the error described below? If not why I got this error?

Can't create a test hardlink between a file in /var/lib/BackupPC//pc
and /var/lib/BackupPC//cpool.  Either these are different file systems,
or this file system doesn't support hardlinks, or these directories don't exist, or there is a permissions problem, or the file system is
out of inodes or full.  Use df, df -i, and ls -ld to check each of
these possibilities. Quitting...

Thank you.

Ok, following the directions here : https://kifarunix.com/install-and-setup-backuppc-server-on-ubuntu-20-04/

I get all the way down to the "Install backuppc on Ubuntu 20.04"

while in the directory backuppc...

Error I get below :

raigo@vikat:~/backuppc$ ./makeDist --nosyntaxCheck --releasedate '30 Jun 2020' --version 4.4.0 Distribution written to dist/BackupPC-4.4.0.tar.gz

raigo@vikat:~/backuppc$ tar zxf BackupPC-4.4.0.tar.gz

tar (child): BackupPC-4.4.0.tar.gz: Cannot open: No such file or directory tar (child): Error is not recoverable: exiting now tar: Child returned status 2 tar: Error is not recoverable: exiting now

raigo@vikat:~/backuppc$ sudo tar zxf BackupPC-4.4.0.tar.gz

tar (child): BackupPC-4.4.0.tar.gz: Cannot open: No such file or directory tar (child): Error is not recoverable: exiting now tar: Child returned status 2 tar: Error is not recoverable: exiting now

Many thanks for help!

I am trying to ssh-copy-id root@linclient and continue to get this message after entering the password. Output of:

ssh -vvv root@linclient

is below:

debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
root@linclient: Permission denied (publickey, password,keyboard-interactive).

/var/log/auth.log:

Jun  3 13:03:28 liclient sshd[10337]: Received signal 15; terminating.
Jun  3 13:03:28 liclient sshd[10454]: Server listening on :: port 22.
Jun  3 13:03:28 liclient sshd[10454]: Server listening on 192.168.0.120 port 22.
Jun  3 13:03:31 liclient sshd[10457]: Connection from 192.168.0.103 port 55298 on 192.168.0.120 port 22
Jun  3 13:03:31 liclient sshd[10457]: Failed publickey for root from 192.168.0.103 port 55298 ssh2: RSA SHA256:J7Gm0ZS6icNOdQ5

In the sshd.config (below) the relevant settings I played with and no success still asking for password authentication and fails after 3 attempts.

PubKeyAuthentication yes  
AuthorizedKeysFlle %h/.ssh/authorized_keys  
ChallengeResponseAuthentication yes  
UsePAM yes  
PermitRootLogin prohibit-password or PermitRootLogin yes      
PasswordAuthentication yes

But for any user, I copied the key on the local machine with success and then ssh without password. Any other users can ssh without password, the only root is not allowed.

It seems that the root cannot log in without password from remote machines. The sshd.config on the clients are identical with the one on the server.

Any input is appreciated. Thanks!

We have a Ubuntu Server 16.04.2 LTS installed on a Dell powerEdge. It has 4x2 TB HDD in RAID-5 configuration.

The thing is, we have to periodically backup 4TB of data and it takes 7 days for a full backup and 3 days for incremental.

Is there a way to improve this speed?