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linux:general:apt [2021/09/26 07:47] – niziaklinux:general:apt [2026/02/06 08:17] (current) – niziak
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 <code>deb http://192.168.0.17:3142/ftp.uni-kl.de/debian etch main</code> <code>deb http://192.168.0.17:3142/ftp.uni-kl.de/debian etch main</code>
  
-====== Commandline ====== 
- 
-===== Disable fsync ===== 
- 
-This trick helps on BTRFS FS 
-<code bash> 
-apt-get install eatmydata 
-eatmydata apt-get update 
-</code> 
- 
-Or wrap some commands permanently with eatmydata 
-<code bash> 
-ln -s /usr/bin/eatmydata /usr/local/bin/aptitude 
-ln -s /usr/bin/eatmydata /usr/local/bin/apt-get 
-ln -s /usr/bin/eatmydata /usr/local/bin/apt-cache 
-</code> 
- 
-===== Playing with apt keys ===== 
- 
-<code bash> 
-sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 8B48AD6246925553 
-</code> 
- 
-<code bash> 
-sudo apt-get install debian-archive-keyring 
-wget http://ftp.pl.debian.org/debian/pool/main/p/pkg-mozilla-archive-keyring/pkg-mozilla-archive-keyring_1.1_all.deb 
-sudo dpkg -i pkg-mozilla-archive-keyring_1.1_all.deb 
-sudo apt-get update 
-</code> 
- 
-<code bash> 
-gpg --keyserver pgpkeys.mit.edu --recv-key  8B48AD6246925553       
-gpg -a --export 8B48AD6246925553 | sudo apt-key add - 
-</code> 
- 
-<code bash> 
-apt-get update 2> /tmp/keymissing; for key in $(grep "NO_PUBKEY" /tmp/keymissing |sed "s/.*NO_PUBKEY //"); do echo -e "\nProcessing key: $key"; gpg --keyserver keyserver.ubuntu.com --recv $key && sudo gpg --export --armor $key | apt-key add -; done 
-</code> 
-===== List all package versions ===== 
- 
-<code bash>apt-cache policy lxc</code> 
-<code> 
-lxc: 
-  Installed: 1:1.0.6-6+deb8u2 
-  Candidate: 1:1.1.5-1 
-  Version table: 
-     1:1.1.5-1 0 
-        500 http://ftp.pl.debian.org/debian/ stretch/main amd64 Packages 
- *** 1:1.0.6-6+deb8u2 0 
-        100 /var/lib/dpkg/status 
- 
-</code> 
- 
-===== Install specified version ===== 
-<code> 
-apt-get install backupninja=0.9.8.1-1 
-apt-mark hold backupninja 
-</code> 
- 
-===== Install with low prio questions ===== 
-To change dpkg-configure question priorities: 
-<code bash>DEBIAN_PRIORITY=low apt-get install ...</code> 
- 
-===== Install from backports ===== 
-List version and priorities: 
-<code>apt-cache policy pulseaudio</code> 
-<code>apt-get install -t jessie-backports pulseaudio</code> 
-<code>aptitude -t jessie-backports</code> 
- 
-<file | /etc/apt/preferences.d/backports> 
-Package: * 
-Pin: release a=jessie-backports 
-Pin-Priority: 500 
- 
-Package: * 
-Pin: release a=stretch-backports 
-Pin-Priority: 500 
-</file> 
- 
-===== Hold package ===== 
-<code bash>echo package_name hold | sudo dpkg --set-selections</code> 
- 
- 
-====== Errors ====== 
- 
-===== trying to overwrite  ===== 
-<code> 
-dpkg: error processing archive /var/cache/apt/archives/gstreamer1.0-plugins-base_1.18.4-2_amd64.deb (--unpack): 
- trying to overwrite '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstcompositor.so', which is also in package gstreamer1.0-plugins-bad:amd64 1:1.14.4-dmo7+deb10u1 
-dpkg-deb: error: paste subprocess was killed by signal (Broken pipe) 
-Errors were encountered while processing: 
- /var/cache/apt/archives/gstreamer1.0-plugins-base_1.18.4-2_amd64.deb 
-Config is in use. 
-</code> 
- 
-<code bash> 
-apt-get -f -o Dpkg::Options::="--force-overwrite" install 
-</code> 
- 
- 
-===== BADSIG =====  
- 
-Error: 
-<code> 
-http://httpredir.debian.org squeeze-lts Release: The following signatures were invalid: BADSIG 8B48AD6246925553 Debian Archive Automatic Signing Key (7.0/wheezy) <ftpmaster@debian.org> 
-</code> 
- 
-<code bash> 
-cd /var/lib/apt 
-sudo mv lists lists.old 
-sudo mkdir -p lists/partial 
-sudo apt-get update 
-</code> 
- 
-This will rebuild the cache. 
- 
-Error: 
-<code> 
-W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 13B00F1FD2C19886 
-</code> 
- 
-<code bash>sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key 13B00F1FD2C19886</code> 
- 
- 
-===== Download is performed unsandboxed ===== 
-Warning: 
-<code> 
-W: Download is performed unsandboxed as root as file '/var/cache/apt/archives/partial/libnet-cidr-lite-perl_0.21-1_all.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied) 
-</code> 
-<code bash> 
- 
-sudo chown -Rv _apt:root /var/cache/apt/archives/ 
-sudo chmod -Rv 774 /var/cache/apt/archives/ 
- 
-</code>