Whenever I do sudo apt install with some package name it is showing E: Unable to locate package .  I have removed 'install-info' file earlier. Does this causing the problem? Also software center is showing no applications.
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When I try to install any package through the command line, I get an error.   $ sudo apt-get install &lt;package&gt; Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package &lt;package&gt;   Can anyone help me on this?
12852
After doing a man apt-get and cursory Google search it's not clear how I find new programs to install (from the internet) using apt-get (which is amazingly powerful and simple coming from another Linux distro).  I'm using Ubuntu Server 8.04 LTS (an inherited system used for some random work), so no GUI.  Anyone have quick advice here?
49774
This is the error I get when I open the software center. I've tried rebooting and running sudo apt-get update but I see no improvement. It worked earlier but I don't know what went wrong since then. I'm using Ubuntu 16.04 final release on a Dell Inspiron 15R. Any advice will be appreciated. Thanks in advance.  EDIT: The problem magically solved itself without me doing anything special (or maybe inadvertently doing something, I don't know). So I'd still like to get to the root of this.
25574
How can I list installed packages by installation date?  I need to do this on debian/ubuntu. Answers for other distributions would be nice as well.  I installed a lot of stuff to compile a certain piece of code, and I want to get a list of the packages that I had to install.
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I removed software center from the terminal and after that I tried to install it from synaptic package manager.  Now I get a message saying that it's unable to retrieve a few packages.  Have a look:  W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/k/kdepimlibs/libkmime4_4.7.1+git111001-0ubuntu1_i386.deb   404  Not Found [IP: 91.189.92.170 80] W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/k/kdepimlibs/libkimap4_4.7.1+git111001-0ubuntu1_i386.deb   404  Not Found [IP: 91.189.92.170 80]   W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/a/akonadi/akonadi-server_1.6.1+git110927-0ubuntu1_i386.deb 404  Not Found [IP: 91.189.92.170 80]   ...   W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/k/kdepim-runtime/kdepim-runtime_4.7.1+git111001-0ubuntu1_i386.deb 404  Not Found [IP: 91.189.92.170 80]   I actually was getting report error pop-ups and was irritated with it so removed the software center and after that I never got this error.  Please help me.
28424
When packages are already installed and I run an apt-get install &lt;package-name&gt;, sometimes it will print a line &lt;package-name&gt; is set to manually installed.  What does that mean?
73030
I'm getting this:  atul@ubuntu:~$ sudo apt-get install traceroute [sudo] password for atul:  Reading package lists... Done Building dependency tree        Reading state information... Done Package traceroute is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source  E: Package 'traceroute' has no installation candidate   Can any one tell me how to solve this problem?
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I have successfully installed some packages using the command line 'sudo apt-get install packagename' when I have known in advance that those packages are available.  But how can I search for or get a list of what is available in the repositories?
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Which folder in Ubuntu is equivalent to C:\Program Files like on windows? Where are all programs installed?  when i type   apt-get install leafpad   or  sudo apt-get install sublime-text-installer   Where do they go??? Which folder?
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I would like to know what some specific package installs, for example, when installing ncurses, I have found that TAB key expands:  sudo apt-get install ncurses-   to show:  ncurses-base      ncurses-doc       ncurses-hexedit ncurses-bin       ncurses-examples  ncurses-term   How could I know what, say, ncurses-term installs? I am interested mainly in programs, but libraries and any other filetypes could be useful too.  Command-line method, if possible, would be preferred (any others accepted too).
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I'd like to find out which packages  sudo apt-get build-dep &lt;package&gt;   would install (if I already got some dependencies installed, I'd also like to see those → so running or simulating the above is not enough). Command line preferred.
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sudo apt-get update E: The method driver /usr/lib/apt/methods/https could not be found. michael@Ubuntu:~$ sudo apt-get clean michael@Ubuntu:~$ cd /var/lib/apt michael@Ubuntu:/var/lib/apt$ sudo mv lists lists.old michael@Ubuntu:/var/lib/apt$ sudo mkdir -p lists/partial michael@Ubuntu:/var/lib/apt$ sudo apt-get clean michael@Ubuntu:/var/lib/apt$ sudo apt-get update E: The method driver /usr/lib/apt/methods/https could not be found. E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? michael@Ubuntu:/var/lib/apt$ sudo apt-get update E: The method driver /usr/lib/apt/methods/https could not be found.   Why am I getting these errors when doing an apt-get update?
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There is an error sign on my Ubuntu panel which states the error given in the title. I used sudo apt-get update but it gave me no errors. However the error sign persists.   How do I fix this?
66247
I'm having issues with my ubuntu server version 12.04 installed on a HP550 laptop, when i try sudo apt-get install &lt;programname&gt;, e.g apache2 it will not work, saying E: Unable to locate package apache2.  I have tried to look/edit the sources. but they will not work either the gedit command is broken too, i am trying gedit /etc/apt/sources.list for those wondering, is this a case of the computer network not configured properly? it downloaded a language pack easily enough in the installation though. how do i fix this? a prompt reply would be appreciated.
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I can't say what steps brought me into this:  → sudo apt-get upgrade  Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? y dpkg: error processing libtiff4 (--configure):  libtiff4:i386 3.9.5-1ubuntu1.1 cannot be configured because libtiff4:k386 is in a different version (3.9.5-1ubuntu1) Errors were encountered while processing:  libtiff4 E: Sub-process /usr/bin/dpkg returned an error code (1)   The following commands all end up in the same error:  sudo apt-get install -f sudo dpkg --configure -a sudo apt-get --fix-broken install sudo apt-get --fix-missing install sudo apt-get clean sudo apt-get autoclean sudo apt-get autoremove   How to solve these kind of problems? And what did I do wrong?  UPDATE I managed to get apt working again by downgrading to previous version (3.9.5-1ubuntu1). However, next upgrade led to the same problem. But there is more info now:  (Reading database ...  dpkg: warning: files list file for package `libtiff4:k386' missing, assuming package has no files currently installed. (Reading database ... 281166 files and directories currently installed.) Preparing to replace libtiff4 3.9.5-1ubuntu1 (using .../libtiff4_3.9.5-1ubuntu1.1_i386.deb) ... Unpacking replacement libtiff4 ... dpkg: error processing libtiff4 (--configure):  libtiff4:i386 3.9.5-1ubuntu1.1 cannot be configured because libtiff4:k386 is in a different version (3.9.5-1ubuntu1) No apport report written because MaxReports is reached already                                                               Errors were encountered while processing:  libtiff4   So the real problem seems to be the missing libtiff4:k386 package. And k386 seems like a stupid typo somewhere.  I tracked down the file that introduces the typo:  **/var/lib/dpkg/status**  Package: libtiff4 Status: install ok half-configured Multi-Arch: same Priority: optional Section: libs Installed-Size: 528 Maintainer: Ubuntu Developers &lt;ubuntu-devel-discuss@lists.ubuntu.com&gt; Architecture: k386 Source: tiff Version: 3.9.5-1ubuntu1 Config-Version: 3.9.5-1ubuntu1 Depends: libc6 (&gt;= 2.11), libjpeg62 (&gt;= 6b1), zlib1g (&gt;= 1:1.1.4) Pre-Depends: multiarch-support Description: Tag Image File Format (TIFF) library  libtiff is a library providing support for the Tag Image File Format  (TIFF), a widely used format for storing image data.  This package  includes the shared library. Homepage: http://libtiff.maptools.org Original-Maintainer: Jay Berkenbilt &lt;qjb@debian.org&gt;   Fixing the typo solves the problem.
122298
I have noticed that while on Ubuntu, if I type the following:  mc   and it isn't installed, I get the message below:  The program 'mc' is currently not installed. You can install it by typing: sudo apt-get install mc   However in Debian, that is not available. It just gives a "-bash: /usr/bin/mc: No such file or directory" message. How can I implement the same functionality in bash command line on Debian? Yes, I know that if it is package suggestion that I want, I can simply do a regex search using apt-cache search. However I was hoping for the simpler suggestion immediately on typing the name of the program.  As per discussions, the functionality is provided by the package command-not-found. However even after installing it, and also installing bash-completion package, this isn't available on the Debian bash shell.
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I have some questions about the APT package manager.     As I understand we have repositories URLs located at /etc/apt/sources.list and /etc/apt/sources.list.d/*      When apt-get update is called, apt tries to connect to all specified repositories in the file and download information about those repositories about what programs are available and so on.      It caches all retrieved data locally in order to use it later without making internet requests to the repository.      When apt-get install is called it searches local cache package list from available repositories and if package is not found it does nothing except display an error.      apt-get search also looks into local cache and doesn't make any requests to the internet.      Am I right? I am not sure about commands that make requests instead of searching data in the local cache.        Also, what is the difference between apt-cache search and apt search? I can guess they both use the local cache.