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computing:miscadmin [2022/09/05 16:16] – oemb1905computing:miscadmin [2024/04/14 18:54] – oemb1905
Line 262: Line 262:
  
   free -h -w -s 3   free -h -w -s 3
 +  
 +postfix to relay, satellite option, enter the relay like this:  to prevent lookups
 +  
 +  [smtp.smtpserver.com]:587
 +  
 +Re-attach to screen session that's attached.
  
- --- //[[jonathan@haacksnetworking.org|oemb1905]] 2022/02/25 00:24//+  screen -d -r <session#.user> 
 +   
 +mysqldump to local from remote 
 + 
 +  ssh root@hub.haacksnetworking.org /usr/bin/mysqldump --all-databases --single-transaction --skip-comments --skip-dump-date > hknet.sqldump 
 +   
 +Turn off sleep. 
 + 
 +  sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target 
 +   
 +Amd gPU errors fix 
 +   
 +  mkdir ~/Repositories 
 +  cd /home/user/Repositories && git clone https://kernel.googlesource.com/pub/scm/linux/kernel/git/firmware/linux-firmware.git 
 +  sudo cp /home/user/Repositories/linux-firmware/amdgpu/* /lib/firmware/amdgpu && sudo update-initramfs -k all -u -v 
 +   
 +Unattended Upgrades 
 + 
 +  sudo apt install unattended-upgrades 
 +  sudo apt install apt-config-auto-update 
 +  sudo unattended-upgrades --dry-run --debug 
 +  sudo systemctl status unattended-upgrades 
 + 
 +Next ... ssh failed attempts 
 + 
 +  grep "Failed password" /var/log/auth.log 
 +  journalctl _SYSTEMD_UNIT=ssh.service | egrep "Failed|Failure" 
 +  faillock --user <user> 
 +  grep "authentication failure" /var/log/auth.log | awk '{ print $14 }' | cut -b7-  | sort | uniq -c 
 + 
 +Display Managers (Lightdm, etc.) 
 + 
 +  sudo nano /etc/lightdm/lightdm-gtk-greeter.conf 
 +  [SeatDefaults] 
 +  allow-guest=false 
 +  greeter-hide-users=true 
 +  nano ~/.config/gtk-3.0/settings.ini 
 +  [Settings] 
 +  gtk-application-prefer-dark-theme=1 
 +  sudo nano /etc/lightdm/lightdm.conf 
 +  cd /usr/share/lightdm/light.conf.d/ 
 +   
 +Setting ufw to allow connections to only certain subnets. 
 + 
 +  ufw allow from 192.168.1.0/24 to any proto tcp port 8006 
 +   
 + --- //[[jonathan@haacksnetworking.org|oemb1905]] 2024/01/28 20:31//
computing/miscadmin.txt · Last modified: 2024/05/05 11:48 by oemb1905

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