125 lines
2.9 KiB
XML
125 lines
2.9 KiB
XML
<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="chap-quick-start">
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<title>Quick Start</title>
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<para>This chapter is for impatient people who don't like reading
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documentation. For more in-depth information you are kindly referred
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to subsequent chapters.</para>
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<procedure>
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<step><para>Install single-user Nix by running the following:
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<screen>
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$ curl https://nixos.org/nix/install | sh
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</screen>
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This will install Nix in <filename>/nix</filename>. The install script
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will create <filename>/nix</filename> using <command>sudo</command>,
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so make sure you have sufficient rights. (For other installation
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methods, see <xref linkend="chap-installation"/>.)</para></step>
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<step><para>See what installable packages are currently available
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in the channel:
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<screen>
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$ nix-env -qa
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docbook-xml-4.3
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docbook-xml-4.5
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firefox-33.0.2
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hello-2.9
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libxslt-1.1.28
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<replaceable>...</replaceable></screen>
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</para></step>
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<step><para>Install some packages from the channel:
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<screen>
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$ nix-env -i hello <replaceable>...</replaceable> </screen>
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This should download pre-built packages; it should not build them
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locally (if it does, something went wrong).</para></step>
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<step><para>Test that they work:
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<screen>
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$ which hello
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/home/eelco/.nix-profile/bin/hello
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$ hello
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Hello, world!
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</screen>
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</para></step>
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<step><para>Uninstall a package:
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<screen>
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$ nix-env -e hello</screen>
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</para></step>
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<step><para>You can also test a package without installing it:
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<screen>
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$ nix-shell -p hello
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</screen>
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This builds or downloads GNU Hello and its dependencies, then drops
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you into a Bash shell where the <command>hello</command> command is
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present, all without affecting your normal environment:
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<screen>
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[nix-shell:~]$ hello
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Hello, world!
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[nix-shell:~]$ exit
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$ hello
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hello: command not found
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</screen>
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</para></step>
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<step><para>To keep up-to-date with the channel, do:
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<screen>
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$ nix-channel --update nixpkgs
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$ nix-env -u '*'</screen>
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The latter command will upgrade each installed package for which there
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is a “newer” version (as determined by comparing the version
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numbers).</para></step>
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<step><para>If you're unhappy with the result of a
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<command>nix-env</command> action (e.g., an upgraded package turned
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out not to work properly), you can go back:
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<screen>
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$ nix-env --rollback</screen>
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</para></step>
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<step><para>You should periodically run the Nix garbage collector
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to get rid of unused packages, since uninstalls or upgrades don't
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actually delete them:
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<screen>
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$ nix-collect-garbage -d</screen>
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<!--
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The first command deletes old “generations” of your profile (making
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rollbacks impossible, but also making the packages in those old
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generations available for garbage collection), while the second
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command actually deletes them.-->
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</para></step>
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</procedure>
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</chapter>
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