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72.
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The default behavior for a command may usually be modified by adding a <emphasis role="strong">-- <emphasis>option</emphasis></emphasis> to the command. The <link linkend="ls"><command>ls</command></link> command, for example, has a <emphasis role="strong">-s</emphasis> option so that <command>ls -s</command> will include file sizes in the listing. There is also a <emphasis role="strong">-h</emphasis> option to get those sizes in a "human readable" format.
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(no translation yet)
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Located in
basic-commands/C/basic-commands.xml:336(para)
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73.
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Options can be grouped in clusters so <screen>ls -sh</screen> is exactly the same command as <screen>ls -s -h</screen> Most options have a long version, prefixed with two dashes instead of one, so even <screen>ls --size --human-readable</screen> is the same command.
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(no translation yet)
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Located in
basic-commands/C/basic-commands.xml:347(para)
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76.
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Virtually all commands understand the <emphasis role="strong">-h</emphasis> (or <emphasis role="strong">--help</emphasis>) option which will produce a short usage description of the command and it's options, then exit back to the command prompt. Type <screen>man -h</screen> or <screen>man --help</screen> to see this in action.
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(no translation yet)
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Located in
basic-commands/C/basic-commands.xml:366(para)
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77.
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Every command and nearly every application in Linux will have a man (manual) file, so finding them is as simple as typing <command>man command</command> to bring up a longer manual entry for the specified command. For example, <screen>man mv</screen> will bring up the <command>mv</command> (move) manual.
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(no translation yet)
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Located in
basic-commands/C/basic-commands.xml:376(para)
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80.
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<screen>man intro</screen> is especially useful - it displays the "Introduction to user commands" which is a well-written, fairly brief introduction to the Linux command line.
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(no translation yet)
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Located in
basic-commands/C/basic-commands.xml:396(para)
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90.
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Often, you will be referred to instructions that require commands to be pasted into the terminal. You might be wondering why the text you've copied from a web page using <keycombo><keycap>Ctrl</keycap><keycap>C</keycap></keycombo> won't paste in with <keycombo><keycap>Ctrl</keycap><keycap>V</keycap></keycombo>. Surely you don't have to type in all those nasty commands and filenames? Relax. Middle Button Click on your mouse (both buttons simultaneously on a two-button mouse) or Right Click and select <menuchoice><guimenuitem>Paste</guimenuitem></menuchoice> from the menu.
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(no translation yet)
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