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Linux introduction: Difference between revisions
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To find manual pages pertaining to a certain subject or keyword (for example | To find manual pages pertaining to a certain subject or keyword (for example <i>directory</i>), please enter: | ||
{{Command|apropos directory}} | {{Command|apropos directory}} | ||
By convention, the executables themselves contain some help on how to use them. | By convention, the executables themselves contain some help on how to use them. | ||
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Generally, you invoke this help using the command line argument <code>-h</code> or <code>--help</code>, or in certain cases, | Generally, you invoke this help using the command line argument <code>-h</code> or <code>--help</code>, or in certain cases, <code>-help</code>. | ||
== Orienting yourself on a system == <!--T:6--> | == Orienting yourself on a system == <!--T:6--> | ||
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Permissions apply to 3 different classes of users, the owner (<code>u</code>), the group (<code>g</code>), and all others or the world (<code>o</code>). To know which permissions are associated to files and subdirectories of the current directory, use the following command: | Permissions apply to 3 different classes of users, the owner (<code>u</code>), the group (<code>g</code>), and all others or <i>the world</i> (<code>o</code>). To know which permissions are associated to files and subdirectories of the current directory, use the following command: | ||
{{Command|ls -la}} | {{Command|ls -la}} | ||
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... or in multiple files: | ... or in multiple files: | ||
{{Command|grep 'tata' fil*}} | {{Command|grep 'tata' fil*}} | ||
Note that, in Linux, the "<code>*</code>" wildcard matches zero or more characters. The | Note that, in Linux, the "<code>*</code>" wildcard matches zero or more characters. The <code>?</code> wildcard matches exactly one character. | ||
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