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Introduction to the Command Line by Nicholas Marsh

By Nicholas Marsh

Creation to the Command Line is a visible advisor that teaches an important Unix and Linux shell instructions in an easy and simple demeanour. Command line courses lined during this booklet are tested with regular utilization to assist within the studying procedure and assist you grasp the command line quick and simply. Covers renowned Unix, Linux, and BSD structures.

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Additional resources for Introduction to the Command Line

Example text

It is similar to the previously discussed cksum command except more intensive. MD5 hashes are the equivalent of a digital fingerprint and are not likely to be duplicated or padded in the same way that cksum hashes (in some rare instances) can. The above example displays the MD5 hash for a Ubuntu Linux CD image downloaded from the internet. The resulting MD5 hash can be compared to the hash from the download site to ensure it arrived without errors. Note The md5 command is used on BSD systems in place of md5sum.

Txt ^R Read File ^Y Prev Page ^K Cut Text ^C Cur Pos ^W Where Is ^V Next Page ^U UnCut Text ^T To Spell Editing a text file with nano nano is a simple editor found on most Linux and BSD systems. It is the recommended editor for new users. Nano's functions such as searching, saving, and closing files are controlled using function keys. The basic functions are listed at the bottom of the nano screen. For example, pressing CTRL + O saves the changes to a file and CTRL + X exits the nano editor. Other functions are described in the following table.

Command line completion is activated using the Tab key on most systems and shown in the following example. $ whe $ whereis Using command line completion In the above example typing whe and pressing the Tab key automatically completes the command whereis without having to type the entire command. Auto-completion also works on file paths. Typing ls -l /etc/en and pressing the Tab key would auto-complete to the file /etc/environment as shown in the next example. $ ls -l /etc/en $ ls -l /etc/environment Command line completion of file names When more than one match is found, the shell will display all matching results.

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