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I have installed the 18.04 LTS server version. I did different commands like:

tar -xzf xxxx.tar.gz xxxx/ (without GUI)
hadfs dfs -put input /input (with GUI)

I did other commands which work with folder too.

However, after this, I installed a GUI using:

sudo apt install tasksel
sudo tasksel install ubuntu-desktop

However, with the GUI installed and using the terminal, some of these commands which work with folder 'change' and maybe I do not need to put the initial or final slash or put it.

My doubt is: why sometimes without the GUI that command is correct and with the GUI the use of the slash change? Maybe is because the GUI that I installed? Or is it a basic noob fail because of my lack of knowledge with Linux systems?

  • I don't really understand what you're trying to say but see the man pages for those commands! I don't think the desktop has something to do with this behaviour! – George Udosen Oct 14 '18 at 11:52
  • For instance, when I run the tar command before installing the GUI, it worked fine, but after, it didn't work. The difference in that command is that slash. – CGG Oct 14 '18 at 11:57
  • Was this done on the same folder when done in the GUI? – George Udosen Oct 14 '18 at 11:59
  • Yes, I am in the same folder and I have done all the same steps. This is why I do not understand if maybe this is because the GUI modifies something, some mistake of mine because I am very 'noob' with Linux... – CGG Oct 14 '18 at 12:21
  • This command tar -xzf xxxx.tar.gz xxxx/ (without GUI) should be tar -xzf xxxx.tar.gz, you are extracting not creating! – George Udosen Oct 14 '18 at 12:30
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I see an error in your command. This tar -xzf xxxx.tar.gz xxxx/ ought to be tar -xzf xxxx.tar.gz. To create a compressed tar file you use:

tar -zcvf xxxx.tar.gz xxxx/

And uncompressing on an already existing folder will simply overwrite it not produce an error. If you intended to uncompress it into a destination folder thenn the command would be:

tar -C xxxx/ -xzvf xxxx.tar.gz

Note: The z is superfluous when used in extracting as tar can determine the right decompression algorithm to use.

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