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--- notes:apt-trick [2014/10/02 17:46] – admin
+++ notes:apt-trick [2014/11/02 11:47] (current) – admin
@@ Line 1: / Line 1: @@
-apt-get
+====== APT tricks for forgetful debian/ubuntu users ======
-You can run a simulation to see what would happen if you upgrade/install a package:
-  apt-get --dry-run install <package> <pkgname>
-(or -s)
-  apt-get install --donwload-only <pkgname>
-(or -d)
+To update your package list
   apt-get update
-so your package list is up-to-date,
-  apt-cache search
+To simulate what would happen if you upgrade/install a package with //--dry-run// or //-s//
+  apt-get install --dry-run <pkgname>
-  apt-cache show postgresql
+To download only a package without installing it with //--download-only// or //-d//
-the simplest way to see the description of a package:
+  apt-get install --download-only <pkgname>
+Re-install a package that is already installed and at the newest version
+  apt-get install --reinstall <pkgname>
-  apt-cache policy <package>
+To upgrade a single package, and only if it is installed.
-Otherwise it prints out detailed information about the
+  apt-get install --only-upgrade <pkgname>
-           priority selection of the named package (as a consequence, installed and candidate versions)
-The apt-cache command can do keyword-based package searches with apt-cache search keyword. It can also display the headers of the package's available versions with apt-cache show package. This command provides the package's description, its dependencies, the name of its maintainer, etc.
+To do keyword-based package searches
+  apt-cache search <keyword>
+To display the description, the headers, the dependencies of a package:
+  apt-cache show <pkgname>
+To show the priority selection of the package (the installed and the repo versions)
+  apt-cache policy <pkgname>
-How to upgrade a single package using apt-get?
+To show all the installed files of a package use
-You just need to do apt-get install --only-upgrade <packagename>. This will upgrade only that single package, and only if it is installed.
+  dpkg-query -L <pkgname>
+or
+  dpkg --listfiles <pkgname>