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Shell Prompt
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When you first login, you should see something like below:
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username$
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This is a shell prompt that will accept your input. We are using the Korn
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Shell (ksh). This shell is how we interact with the computer. This environment
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is often called the "command line" because you type commands to the computer and
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it responds to you. We don't use mice or touchscreens much. Once you get used
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to it, you will come to like it.
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If you see a # dollar sign instead, it means you are logged in as the superuser
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(root). If you are root, you have system administrator powers. The superuser
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has total control over the computer, whereas a normal user has limited powers.
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In UNIX, every command must be run by a user. The $ sign you see at the
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beginning of the shell prompt means you are running as normal user.
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Note that all of our commands begin with either a $ dollar sign or # pound
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$ less .shell
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# whoami
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We don't actually type the $ dollar sign or # pound symbol. The $ dollar sign
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means to run the command as a normal user, and the # pound symbol means to
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run the command as superuser (root).
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If you type commands that don't exist:
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username$ ircnow of the users by the users for the users
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ksh: ircnow: not found
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The shell ksh (korn shell) will tell you the command is not found.
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Practice Some Commands
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Press q to quit, then
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$ less .shell
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to return to this tutorial.
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To find out what user you are running as, type $ whoami
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To view the current date, type $ date
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To view a calendar, type $ cal
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To see how much space we have on our disk, type $ df
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Cool Tip: If you press the up arrow key, you can scroll through your previous
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commands. Press on the down arrow key to scroll through more recent commands.
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You can also use the left and right arrow key to edit your previous commands.
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To view all your old commands, type $ history
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To move on to the next level, open the file .unix102.txt (note the period in
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$ less .unix102.txt
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