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====== Joshua, Linux Server =======

Purchased a small Intel NUC computer, which has a Intel Core i7 Processor, 8 Gb RAM (32 Gb maximum), 40 Gb SSD as a possible Minecraft server.

**Drives**
^Device^Mounted^Size^Usage^
^/dev/sda1|/|47G|OS|
^/dev/sdd1|/var/nas|1T|NAS Misc.|
^/dev/sdc1|/var/backup|5T|Backup|
^/dev/sdg1|/var/nas2|8T|Backup whole System|

^Desc|Intel NUC|
^S/N|G6BN81900H2Z|
^SA|J31153-311|
^Product Code|BOXNUC 7i7BNH|
^Manu.|5/2018|
^Comment|Intel NUC 7 Mainstream Kit\\ Core 7|



<code bash>
dwheele@joshua:~$ uname -a
Linux joshua 6.1.0-15-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.66-1 (2023-12-09) x86_64 GNU/Linux
</code>
[as of 9/10/2025]


===== Setup =====

Added git with this command:

''apt-git install git-all''

===== Oracle XE =====

For work, installed Oracle XE

The download was an rpm, so had to install ''alien'' to install the rpm. ''sudo rpm -i package-to-install.rpm''

Also had to install libaio:

<code bash>
sudo apt-get install libaio1
</code>

https://docs.oracle.com/en/database/oracle/oracle-database/18/xeinl/starting-and-stopping-oracle-database.html

^Start|sudo systemctl start oracle-xe-18c|
^Stop|sudo systemctl stop oracle-xe-18c|
^Restart|sudo systemctl restart oracle-xe-18c|



==== Troubleshooting ====

^Problem|Could not access outside of the local network|
^Solution|Made change to ''NetworkManager.conf'' (added ''dns=none'' in the [main] section) to turn off its overwriting of /etc/resolv.conf, followed by creating the resolv.conf file to have literally ''nameserver 192.168.0.1''|

https://askubuntu.com/questions/623940/network-manager-how-to-stop-nm-updating-etc-resolv-conf

Helpful: to temporarily to restore network service, long enough to install some tools (the ethernet card is "eno1":

<code bash>
dhclient eno1
</code>

This will help troubleshoot network:

<code bash>
# apt-get install ifupdown-extra

network-test
</code>

===== Kept going to sleep =====

After doing some upgrades, server Joshua kept going to sleep. I read this, and tried it:

* https://unix.stackexchange.com/questions/529471/debian-10-adjust-sleep-settings-via-command-line

//There is possibly a better way: edit /etc/systemd/sleep.conf and activate the following two lines://

<code>
AllowSuspend=no
AllowHibernation=no
</code>

2/9/2022

===== Installed minidlna, a DLNA/UPNP Server =====

Wanted to serve photos to the Oculus from the file system. So installed MiniDLNA, a.k.a. ReadyMedia. 

See https://www.bananatronics.org/installation-and-configuration-of-minidlna-readymedia/

  sudo apt install minidlna
  vi /etc/minidlna.conf (adjusting media_dir=/var/nas/Videos)
  sudo service minidlna restart
  sudo systemctl enable minidlna (not sure what this does)

Visible from Windows Media Player, Oculus Pigasus, Oculus DeoVR


===== Couldn't log in with SSH key =====

Received this error in /var/log/auth.log

<code text>
 sshd[167454]: userauth_pubkey: signature algorithm ssh-rsa not in PubkeyAcceptedAlgorithms 
</code>
Fixed by running these:

<code bash>


root@someserver~]# vim /etc/ssh/sshd_config

// Add this to end of file
PubkeyAcceptedKeyTypes +ssh-rsa

root@someserver ~]# systemctl restart sshd
</code>

Reason? //This error occurs because the SHA RSA 1 algorithm that DeployHQ traditionally used for key generation, is no longer supported out the box in newer Linux systems.//


https://www.ezeelogin.com/kb/article/userauth_pubkey-signature-algorithm-ssh-rsa-not-in-pubkeyacceptedalgorithms-518.html


====== Had problems when booting, apt upgrade'ing ======


Ran this:
<code>
sudo apt full-upgrade
</code>

<code text>
Errors were encountered while processing:
 linux-image-6.1.0-13-amd64
 linux-headers-6.1.0-13-amd64
 linux-headers-amd64
 linux-image-amd64
E: Sub-process /usr/bin/dpkg returned an error code (1)
</code>

Trying this:
<code>
sudo apt remove aufs-dkms
</code>

====== Wouldn't Boot after fstab change ======

I bought a large external HDD, modified fstab incorrectly. Kept getting errors on start up.

It kept asking me for the root password for maintenance. Unfortunately I didn't supply the right one (see usual KeePass for the server name). That allowed me to edit the /etc/fstab value to look like this instead:

<code bash>
UUID=135260b9-26cd-41b9-8e69-9489a5d3fe32 /var/nas2     auto    rw,user 0       1
</code>

(I had left off the rw,user value, causing the 0 and 1 to be in the wrong positions. [5/6/2025])
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