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--- linux:ubuntu:ubuntu [2020/06/29 19:45] – [SFTP] tmade
+++ linux:ubuntu:ubuntu [2022/12/20 10:41] – [apt-key] tmade
@@ Line 47: / Line 47: @@
   apt-get install ocfs2-tools ocfs2console                    #Install ocfs2
   dpkg-reconfigure ocfs2-tools                                #To configure ocfs2
   apt-get install cifs-utils
+  apt install ffmpeg                                          #install videocodec
   apt-get install mailutils
   apt-get install libncurses5-dev                             #Mysql
@@ Line 58: / Line 59: @@
   apt-cache madison docker-ce                                 #show available versions
+  apt-cache policy kubeadm                                    #show package and version
+  apt-cache search curl                                       #show available packages
   apt-get install -y docker-ce=5:18.09.9~3-0~ubuntu-xenial --allow-downgrades
@@ Line 87: / Line 90: @@
   apt-get install linux-generic-lts-xenial
   dpkg -s motion | head -n5                                   #show package infos, status, dependencies...
 Repair:
   apt-get -f install
   apt-get autoremove
+  apt-get update --allow-releaseinfo-change
   apt-get purge
   apt-get clean
@@ Line 123: / Line 127: @@
   apt-key adv --keyserver-options http-proxy=http://PROXYIP:8080 --keyserver hkp://keyserver.ubuntu.com:80 --recv <KEY>
   apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv
+Check a key:
+  curl -fsSL https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/InRelease | gpg --show-keys
+Hint to export keys to gpg-key:
+https://askubuntu.com/questions/1398344/apt-key-deprecation-warning-when-updating-system
@@ Line 387: / Line 397: @@
   update-rc.d -f apache2 remove                   #Remove service apache from autostart
-Ubuntu 16.04:
+Ubuntu >= 16.04:
-  sudo systemctl stop mysql.service
+  sudo systemctl is-enabled mysql.service
   sudo systemctl disable mysql.service
+  sudo systemctl enable mysql.service
@@ Line 555: / Line 566: @@
 https://www.howtogeek.com/howto/44997/how-to-use-bash-history-to-improve-your-command-line-productivity/
+===Powersave===
+https://help.ubuntu.com/community/PowerManagement/ReducedPower
+The pm-utils package comes with scripts for managing low-power modes.
+  sudo apt-get install pm-utils
+In order to enter low power mode, run this:
+  sudo pm-powersave true
+In order to leave low power mode, run this:
+  sudo pm-powersave false