11. How to install
Packages without Upgrading
Using
sub ‘–no-upgrade‘ command will prevent already
installed packages from upgrading.
Building dependency tree
Reading state information... Done
Skipping vsftpd, it is already installed and upgrade is not set.
0 upgraded, 0 newly installed, 0 to remove and 328 not upgraded.
12. How to Upgrade Only Specific
Packages
The
‘–only-upgrade‘ command do not install new
packages but it only upgrade the already installed packages and disables new
installation of packages.
Building dependency tree
Reading state information... Done
vsftpd is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 328 not upgraded.
13. How Do I Install Specific Package
Version?
Let’s
say you wish to install only specific version of packages, simply use the ‘=‘ with the package-name and append desired
version.
Building dependency tree
Reading state information... Done
vsftpd is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 328 not upgraded.
14. How Do I Remove Packages Without
Configuration
To
un-install software packages without removing their configuration files (for
later re-use the same configuration). Use the ‘remove‘ command as shown.
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
vsftpd
0 upgraded, 0 newly installed, 1 to remove and 328 not upgraded.
After this operation, 364 kB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 216156 files and directories currently installed.)
Removing vsftpd ...
vsftpd stop/waiting
Processing triggers for ureadahead ...
Processing triggers for man-db ...
15. How Do I Completely Remove
Packages
To
remove software packages including their configuration files, use the ‘purge‘ sub command as shown below.
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
vsftpd*
0 upgraded, 0 newly installed, 1 to remove and 328 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 216107 files and directories currently installed.)
Removing vsftpd ...
Purging configuration files for vsftpd ...
Processing triggers for ureadahead ...
Alternatively, you can combine
both the commands together as shown below.
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
vsftpd*
0 upgraded, 0 newly installed, 1 to remove and 328 not upgraded.
After this operation, 364 kB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 216156 files and directories currently installed.)
Removing vsftpd ...
vsftpd stop/waiting
Purging configuration files for vsftpd ...
Processing triggers for ureadahead ...
Processing triggers for man-db ...
16. How I Can Clean Up Disk Space
The
‘clean‘ command is used to free up
the disk space by cleaning retrieved (downloaded) .deb files (packages) from the
local repository.
17. How Do I Download Only Source Code
of Package
To
download only source code of particular package, use the option ‘–download-only source‘ with
‘package-name’ as shown.
Building dependency tree
Reading state information... Done
Need to get 220 kB of source archives.
Get:1 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (dsc) [1,883 B]
Get:2 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (tar) [188 kB]
Get:3 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (diff) [30.5 kB]
Fetched 220 kB in 4s (49.1 kB/s)
Download complete and in download only mode
18. How Can I Download and Unpack a
Package
To download and unpack source
code of a package to a specific directory, type the following command.
Building dependency tree
Reading state information... Done
Need to get 220 kB of source archives.
Get:1 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (dsc) [1,883 B]
Get:2 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (tar) [188 kB]
Get:3 http://in.archive.ubuntu.com/ubuntu/ quantal/main vsftpd 2.3.5-3ubuntu1 (diff) [30.5 kB]
Fetched 220 kB in 1s (112 kB/s)
gpgv: Signature made Thursday 24 May 2012 02:35:09 AM IST using RSA key ID 2C48EE4E
gpgv: Can't check signature: public key not found
dpkg-source: warning: failed to verify signature on ./vsftpd_2.3.5-3ubuntu1.dsc
dpkg-source: info: extracting vsftpd in vsftpd-2.3.5
dpkg-source: info: unpacking vsftpd_2.3.5.orig.tar.gz
dpkg-source: info: unpacking vsftpd_2.3.5-3ubuntu1.debian.tar.gz
dpkg-source: info: applying 01-builddefs.patch
dpkg-source: info: applying 02-config.patch
dpkg-source: info: applying 03-db-doc.patch
dpkg-source: info: applying 04-link-local.patch
dpkg-source: info: applying 05-whitespaces.patch
dpkg-source: info: applying 06-greedy.patch
dpkg-source: info: applying 07-utf8.patch
dpkg-source: info: applying 08-manpage.patch
dpkg-source: info: applying 09-s390.patch
dpkg-source: info: applying 10-remote-dos.patch
dpkg-source: info: applying 11-alpha.patch
dpkg-source: info: applying 09-disable-anonymous.patch
dpkg-source: info: applying 12-ubuntu-use-snakeoil-ssl.patch
19. How Can I Download, Unpack and
Compile a Package
You
can also download, unpack and compile the source code at the same time, using
option ‘–compile‘ as shown below.
Reading package lists... Done
Building dependency tree
Reading state information... Done
Need to get 130 kB of source archives.
Get:1 http://in.archive.ubuntu.com/ubuntu/ quantal/universe goaccess 1:0.5-1 (dsc) [1,120 B]
Get:2 http://in.archive.ubuntu.com/ubuntu/ quantal/universe goaccess 1:0.5-1 (tar) [127 kB]
Get:3 http://in.archive.ubuntu.com/ubuntu/ quantal/universe goaccess 1:0.5-1 (diff) [2,075 B]
Fetched 130 kB in 1s (68.0 kB/s)
gpgv: Signature made Tuesday 26 June 2012 09:38:24 AM IST using DSA key ID A9FD4821
gpgv: Can't check signature: public key not found
dpkg-source: warning: failed to verify signature on ./goaccess_0.5-1.dsc
dpkg-source: info: extracting goaccess in goaccess-0.5
dpkg-source: info: unpacking goaccess_0.5.orig.tar.gz
dpkg-source: info: unpacking goaccess_0.5-1.debian.tar.gz
dpkg-buildpackage: source package goaccess
dpkg-buildpackage: source version 1:0.5-1
dpkg-buildpackage: source changed by Chris Taylor <ctaylor@debian.org>
dpkg-buildpackage: host architecture i386
dpkg-source --before-build goaccess-0.5
dpkg-checkbuilddeps: Unmet build dependencies: debhelper (>= 9) autotools-dev libncurses5-dev libglib2.0-dev libgeoip-dev autoconf
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied; aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
...
20. How Do I Download a Package
Without Installing
Using
‘download‘ option, you can download any
given package without installing it. For example, the following command will
only download ‘nethogs‘ package to current
working directory.
Fetched 27.1 kB in 3s (7,506 B/s)
21. How Do I Check Change Log of
Package?
The
‘changelog‘ flag downloads a package
change-log and shows the package version that is installed.
* Merge from Debian testing (LP: #1003644). Remaining changes:
+ debian/vsftpd.upstart: migrate vsftpd to upstart.
+ Add apport hook (LP: #513978):
- debian/vsftpd.apport: Added.
- debian/control: Build-depends on dh-apport.
- debian/rules: Add --with apport.
+ Add debian/watch file.
+ debian/patches/09-disable-anonymous.patch: Disable anonymous login
by default. (LP: #528860)
* debian/patches/12-ubuntu-us-snakeoil-ssl.patch: Use snakeoil SSL
certificates and key.
-- Andres Rodriguez <andreserl@ubuntu.com> Wed, 23 May 2012 16:59:36 -0400
...
22. How Do I Check Broken
Dependencies?
The
‘check‘ command is a diagnostic tool.
It used to update package cache and checks for broken dependencies.
Reading package lists... Done
Building dependency tree
Reading state information... Done
23. How Do I Search and Build
Dependencies?
This
‘build-dep‘ command searches the local
repositories in the system and install the build dependencies for package. If
the package does not exists in the local repository it will return an error
code.
debhelper dh-apparmor html2text po-debconf quilt
0 upgraded, 5 newly installed, 0 to remove and 328 not upgraded.
Need to get 1,219 kB of archives.
After this operation, 2,592 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://in.archive.ubuntu.com/ubuntu/ quantal/main html2text i386 1.3.2a-15build1 [91.4 kB]
Get:2 http://in.archive.ubuntu.com/ubuntu/ quantal/main po-debconf all 1.0.16+nmu2ubuntu1 [210 kB]
Get:3 http://in.archive.ubuntu.com/ubuntu/ quantal/main dh-apparmor all 2.8.0-0ubuntu5 [9,846 B]
Get:4 http://in.archive.ubuntu.com/ubuntu/ quantal/main debhelper all 9.20120608ubuntu1 [623 kB]
Get:5 http://in.archive.ubuntu.com/ubuntu/ quantal/main quilt all 0.60-2 [285 kB]
Fetched 1,219 kB in 4s (285 kB/s)
...
24. How I Can Auto clean Apt-Get
Cache?
The
‘autoclean‘ command deletes all .deb files from /var/cache/apt/archives to
free-up significant volume of disk space.
Building dependency tree
Reading state information... Done
25. How I Can Auto remove Installed
Packages?
The
‘autoremove‘ sub command is used to auto
remove packages that were certainly installed to satisfy dependencies for other
packages and but they were now no longer required. For example, the following
command will remove an installed package with its dependencies.
Building dependency tree
Reading state information... Done
Package 'vsftpd' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 328 not upgraded.
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