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Thread: entering a vertical straight line in the terminal

  1. #1
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    Aug 2013
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    entering a vertical straight line in the terminal

    I am trying to enter a command into the terminal, and I'm unsure about a straight line in the command. I don't know if it is actually supposed to be entered or if it's there to show a break or something. It is the line between "zero" and "nc" in the following. host-a$ cat /dev/zero | nc -l -p 12345 I know this is a complete noob question, so thanks for the help.
    Last edited by philinux; August 17th, 2013 at 02:23 PM. Reason: added vertical to title

  2. #2
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    Re: entering a straight line in the terminal

    The | symbol is sometimes known as a "pipe" symbol. In the example you give, it's part of the command sequence. It roughly translates to "Take the output from one command and use it as input to the next command."
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  3. #3
    Join Date
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    pipe

    The straight line is called a pipe. It takes output from the first program and uses it as input for the second. However, the example using cat you have is a little strange.

    Code:
    ls /usr/bin
    ls /usr/bin | less
    
    ls /usr/bin/*grep* 
    ls /usr/bin/*grep* | wc -l
    You can hook as many programs together in that way as you want.

    Code:
    apt-cache search xml 
    apt-cache search xml | sort 
    apt-cache search xml | sort | less
    You can also use < and > and >> to redirect IO.

  4. #4
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    Re: entering a straight line in the terminal

    Also on my laptop the only way to get the "pipe" is with alt gr + |
    Alt gr is the key to the right of the spacebar.
    If I don't use it then I get ` or ¬

  5. #5
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    Xubuntu 14.10 Utopic Unicorn

    Re: entering a vertical straight line in the terminal

    If you're using a US keyboard, Shift-\ should give you a pipe.

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