Ekaanbj: /* Installed packages. */

2026-04-16T13:05:11Z

Installed packages.

← Older revision		Revision as of 13:05, 16 April 2026
Line 23:		Line 23:

	=Installed packages.=		=Installed packages.=
			dpkg-query -W
	dpkg --get-selections		dpkg --get-selections
	apt-get install openssh-client openssh-server		apt-get install openssh-client openssh-server

Ekaanbj: /* List contents of package */

2026-02-20T08:08:47Z

List contents of package

← Older revision		Revision as of 08:08, 20 February 2026
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	dpkg -c <$package.deb>		dpkg -c <$package.deb>
	dpkg -c pgpool2		dpkg -c pgpool2
			dpkg -L <package>

	=Update apt-file database=		=Update apt-file database=

Ekaanbj: /* remove delete uninstall deb package */

2026-02-05T06:38:17Z

remove delete uninstall deb package

← Older revision		Revision as of 06:38, 5 February 2026
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	=remove delete uninstall deb package=		=remove delete uninstall deb package=
	apt remove <deb>		apt remove <deb>
			dpkg -r <deb>
			Remove config files too.
			apt purge <deb>
			dpkg -P <deb>

	=add sources=		=add sources=

Ekaanbj: /* install local deb packages */

2026-02-05T06:23:30Z

install local deb packages

← Older revision		Revision as of 06:23, 5 February 2026
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	=install local deb packages=		=install local deb packages=
	sudo dpkg -i 1.deb 2.deb		sudo dpkg -i 1.deb 2.deb
			=remove delete uninstall deb package=
			apt remove <deb>

	=add sources=		=add sources=
	find sources.		find sources.

Ekaanbj: /* dowload deb */

2025-08-27T11:16:29Z

dowload deb

New page

==Which package contains file==
apt-file search filename
dpkg -S /usr/sbin/apache2

==List contents of package==
apt-file list packagename
dpkg -c <$package.deb>
dpkg -c pgpool2

=Update apt-file database=
apt-file update
=updates the list of available packages and their versions=
apt-get update

=upgrade single package=
apt --only-upgrade install apache2
=Is restart of service requirred=
needrestart

=show installed packages in cronological order=
zcat -f /var/log/dpkg.log* | grep "\ install\ " | sort | tail

=Installed packages.=
dpkg --get-selections
apt-get install openssh-client openssh-server

=List packages on one machine and install on another.=
dpkg --get-selections > installed-software
dpkg --set-selections < installed-software
dselect

=Upgrade.=
sudo apt-get -y update
sudo apt-get -y upgrade

=Which package provides.=
http://packages.ubuntu.com/

=List available linux packages.=
apt-cache pkgnames

=install local deb packages=
sudo dpkg -i 1.deb 2.deb
=add sources=
find sources.
cat $(find /etc/apt/sources.list{,.d} -type f )| bash_clean_comments | awk '{print $2 " " $3}' | sort | uniq

=install from experimental=
# add next row to /etc/apt/sources.list and do an apt-get update
deb http://ftp.debian.org/debian/ experimental main contrib non-free
# Then install latest version of ekiga.
apt-get -t experimental install ekiga

=which version of debian=
lsb_release

=add gpg key=
gpg --keyserver subkeys.pgp.net --recv-keys AED4B06F473041FA
gpg -a --export AED4B06F473041FA | sudo apt-key add -
=clean /var/cache/apt=
sudo apt-get clean

=which version is available and installed(*** means installed)=
apt-cache policy apache2-bin
=Read values from the debconf database=
debconf-get-selections | grep ^iptables-persistent
=Set value in debconf database=
echo newrelic-php5 newrelic-php5/application-name string "blablabla" | debconf-set-selections
=dowload deb=
sudo apt-get install --download-only --reinstall sudo
apt-get download <package-name>

=verify deb package(changes)=
checksums are stored /var/lib/dpkg/info/elasticsearch.md5sums
dpkg --verify elasticsearch
??5?????? c /etc/elasticsearch/elasticsearch.yml
??5?????? c /etc/elasticsearch/jvm.options

=extract deb=
dpkg-deb -xv elasticsearch_7.9.3_amd64.deb .
=configure networks=
/etc/netplan/10-eth0.yaml
netplan apply
=add static route=
/etc/network/interfaces
#--------------------------------------------#
# Setup eth0 - connected to private LAN/VLAN #
#--------------------------------------------#
auto eth0
allow-hotplug eth0
iface eth0 inet static
address 10.70.201.5
netmask 255.255.255.192
### Ubuntu Linux add persistent route command ###
post-up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.70.201.6
=add static route netplan way=
network:
ethernets:
enp0s3:
dhcp4: false
addresses: [192.168.1.202/24]
gateway4: 192.168.1.1
nameservers:
addresses: [8.8.8.8,8.8.4.4,192.168.1.1]
routes:
- to: 172.16.0.0/24
via: 192.168.1.100
version: 2
# netplan apply
==multiple interface==
/etc/netplan/50-cloud-init.yaml
network:
version: 2
ethernets:
ens3:
dhcp4: true
dhcp6: true
match:
macaddress: fa:16:3e:84:e6:98
mtu: 1500
set-name: ens3
ens4:
dhcp4: true
dhcp6: false
match:
macaddress: fa:16:3e:20:fa:72
mtu: 1450
set-name: ens4
dhcp4-overrides:
route-metric: 200
ens5:
dhcp4: true
dhcp6: false
match:
macaddress: fa:16:3e:3a:7a:a4
mtu: 1450
set-name: ens5
dhcp4-overrides:
route-metric: 200

=enable sysstat=
apt -y install sysstat
sed -i 's/ENABLED="false"/ENABLED="true"/g' /etc/default/sysstat
systemctl restart sysstat

=automatic update=
Disable automatic updates.
sed -i 's/APT::Periodic::Unattended-Upgrade "1";/APT::Periodic::Unattended-Upgrade "0";/g' /etc/apt/apt.conf.d/20auto-upgrades

[[Category:Applications]]
[[Category:Unix]]

Ubuntu - Revision history

Ekaanbj: /* Installed packages. */

Ekaanbj: /* List contents of package */

Ekaanbj: /* remove delete uninstall deb package */

Ekaanbj: /* install local deb packages */

Ekaanbj: /* dowload deb */