Upgrading Software – Ubuntu Server Edition

Posted by | Posted in Command-Line, Linux, Ubuntu | Posted on 17-07-2009

When it comes to any server, you normally have to update its software remotely. Either by command shell or remote desktop. For this demonstration, I am going to access my server via SSH and use the Ubuntu/Debian package manager called “/usr/bin/apt-get” – APT package handling utility — command-line interface.

user@server:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages have been kept back:
  linux-image-server linux-restricted-modules-server linux-server
The following packages will be upgraded:
  acpid apache2 apache2-mpm-prefork apache2-utils apache2.2-common ..... etc.....
47 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
Need to get 57.4MB of archives.
After this operation, 20.5kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://us.archive.ubuntu.com jaunty-updates/main perl-modules 5.10.0-19ubuntu1.1 [3182kB]
...
...
...
...
etc until all the applications have downloaded
...
Fetched 57.4MB in 48s (1173kB/s)                                                                                                                                                  
Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 24637 files and directories currently installed.)
Preparing to replace perl-modules 5.10.0-19ubuntu1 (using .../perl-modules_5.10.0-19ubuntu1.1_all.deb) ...
Unpacking replacement perl-modules ...
...
...
...
Now everything application that needed updated, will unpack and install.
..
..
If any application (daemons) that are running, are upgraded, apt-get automatically restarts those programs.
....
Setting up apache2 (2.2.11-2ubuntu2.2) ...
Setting up libapache2-mod-php5 (5.2.6.dfsg.1-3ubuntu4.1) ...
 * Reloading web server config apache2
   ...done.

and it is just as simple as that.

Family Commands for apt-get are

/usr/bin/apt-cache - APT package handling utility -- cache manipulator
/usr/bin/apt-cdrom - APT CDROM management utility
/usr/bin/dpkg - package manager for Debian
/usr/bin/dselect - Debian package management frontend
/etc/apt/sources.list - https://help.ubuntu.com/community/SourcesList
/etc/apt/apt.conf -  Configuration file for APT
/usr/bin/apt-config - APT Configuration Query program
/usr/bin/apt-secure - Archive authentication support for APT
/etc/apt/preferences - Preference control file for APT - apt_preferences
APT User’s guide in /usr/share/doc/apt-doc/

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