[Advice] The Laws-of-Linux ... and other sundries of computing

[donald]

bbbhltz wrote: ↑2024-02-20 14:54
Whatever you choose, make sure it can be backed up or easily exported.

[donald]

Sometimes we have old devices or net appliances that new standards have phased out, the problem is the devices are still usable somewhere or you need to get into one. This happens mostly with outdated systems that use ssh/sftp.

The error is the clue:

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Sun Mar 17 00:29:24)
{donald}@[computers.org]
{~}:$> ssh donald@10.10.10.10
Unable to negotiate with 10.10.10.10 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss

Change your key type to match what the system has:

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(Sun Mar 17 00:30:11)
{donald}@[computers.org]
{~}:$> ssh -o HostKeyAlgorithms=ssh-rsa,ssh-dss donald@10.10.10.10
The authenticity of host '10.10.10.10 (10.10.10.10)' can't be established.
RSA key fingerprint is SHA256:.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.10.10.10' (RSA) to the list of known hosts.

Tada!

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(donald@10.10.10.10) Password: 
Welcome the System Command Line Interface 
(c)Copyright 2006
donald@10.10.10.10 >

[CwF]

With infrequent use of some things that have been moved I sometimes hit this

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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:something.
Please contact your system administrator.
Add correct host key in /home/dom0/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/dom0/.ssh/known_hosts:2
  remove with:
  ssh-keygen -f "/home/dom0/.ssh/known_hosts" -R 10.10.10.67
ECDSA host key for 10.10.10.67 has changed and you have requested strict checking.
Host key verification failed.

[donald]

mfsymlink allows for unix style symlinks on mounted SMB volumes. It is very useful for allowing unix style symlinks for Windows and Mac clients on the network.

/etc/fstab:

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 //SMBSERVER/SMBSHARE /MOUNTDIR cifs uid=$usernameOR$uid,gid=$groupnameOR$gid,credentials=/home/$USER/.credentials 0 0 

command line:

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 sudo  mount -t cifs -o credentials=/home/$USER/.credentials,dir_mode=0755,file_mode=0775,mfsymlinks,uid=$usernameOR$uid,gid=$groupnameOR$gid //SMBSERVER/SMBSHARE /MOUNTDIR

Proofs:

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donald@computer ~ $ mount 
//overheadlamp/donald on /home/donald/lightbulb type cifs (rw,relatime,vers=3.1.1,cache=strict,username=donald,uid=1000,noforceuid,gid=1000,noforcegid,addr=10.90.90.95,file_mode=0775,dir_mode=0755,soft,nounix,serverino,mapposix,mfsymlinks,rsize=4194304,wsize=4194304,bsize=1048576,echo_interval=60,actimeo=1,closetimeo=1)

donald@computer ~ $ ls -lst lightbulb/
total 4
4 lrwxrwxrwx 1 donald donald 34 Apr 13 16:14 directory -> /home/donald/directory
0 -rwxrwxr-x 1 donald donald 0 Apr 13 15:43 hello
0 -rwxrwxr-x 1 donald donald 0 Apr 13 15:29 hiee
0 -rwxrwxr-x 1 donald donald 0 Apr 13 15:29 hi