ShellLearning Linux Commands143command-line (Yahoo web hosting) utilities that come with Linux.
ShellLearning Linux Commands143command-line utilities that come with Linux. In this section, I introduce youto a few major categories of Linux commands. I can t possibly cover all the Linux commands in this chapter, but I want togive you a feel for the breadth of the commands by showing you a list ofcommon Linux commands in Table 2-1. It lists common Linux commands bycategory. Before you start learning any Linux commands, browse this table. Table 2-1Overview of Common Linux CommandsCommand NameActionGetting Online HelpaproposFinds online manual pages for a specified keyword. infoDisplays online help information about a specified command. manDisplays online help information. whatisSimilar to apropos, but searches for complete words only. Making Commands EasieraliasDefines an abbreviation for a long command. typeShows the type and location of a command. unaliasDeletes an abbreviation defined using alias. Managing Files and DirectoriescdChanges the current directory. chmodChanges file permissions. chownChanges file owner and group. cpCopies files. lnCreates symbolic links to files and directories. lsDisplays the contents of a directory. mkdirCreates a directory. mvRenames a file as well as moves a file from one directory toanother. rmDeletes files. rmdirDeletes directories. pwdDisplays the current directory. touchUpdates a file s time stamp. Finding FilesfindFinds files based on specified criteria such as name, size, andso on. locateFinds files using a periodically updated database. (continued)
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