Episode-59

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linuxlugcast 59

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Brian Brodsky on G+

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FiftyOneFifty   
1)Manually configuring a static IP in Arch with systemd:  systemd no longer defaults to /etc/system/interfaces to determine your network settings.  The Arch wiki instead directs you to pick the most appropriate network profile from /etc/netctl/examples, copy/rename it into /etc/netctl, edit it to fit your situation, and change your config via “sudo netctl start profile” and make it permanent via “sudo netctl enable profile”.  
[ https://wiki.archlinux.org/index.php/Network_configuration#Static_IP_address ]Unfortunately, the start command gave me errors, the enable command did not, but after a reboot, my server IP was still determined by DHCP.

Since netctrl was obviously supposed to just copy parameters into a config file, I looked into just editing that file directly.   My answer came from Linode
( https://www.linode.com/docs/networking/linux-static-ip-configuration ).  Edit /etc/systemd/network/interface.network directly.  My RPI server’s file looks like:

[Match]
Name=eth0
Host=barsoom

[Network]
#DHCP=both
Gateway=192.168.2.1
Address=192.168.2.50/24
DNS=192.168.2.1


2)Forcibly resetting root password:  There is no security but physical security.  Editing the /etc/shadow file.  Recently, I set up DietPi to try to get Pi-hole and Nagios on the same machine.  Somehow, the final step in DietPi config fouled up resetting the password w/o reinstalling.

1. Mount the SD card in another machine

2. Locate file /etc/shadow

1. In the first line, delete everything between “root:” and the next colon, i.e, line will now be root::random_string

2. Unmount SD

3. Boot as root on Pi

1. Create new password

As cheap as Pi’s are, I don’t feel I should have to buy one for each task (i.e., I’d like to put Pi-Hole and Nagios on the same box). I’m hoping the community can come together to give me a solution.

We all discuss what Linux systems we are running and why