Difference: Lecture2:TheLinuxOperatingSystem (4 vs. 5)

Revision 52017-11-03 - uli

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Slide 1: The Linux Operating System

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this is what I get:

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The left rwx means that the file owner can

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read
write
and execute

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Read
Write
and eXecute

the file. The middle 3 characters have the same meaning for group members

and the last 3 characters for any user.

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chmod 655 Makefile (what will be the file permissions after the command?)

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Changing the eXexute flag in a shell script to make it executable is often done:

The super user

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The current working directory is “.”

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“..” is the directory one level lower from the current working directory

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“..” is the directory one level up from the current working directory

(goto the parent directory of the current directory)

Change Settings

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Settings

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bash scripts

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You can collect commands in a script file (e.g. myscript.sh)

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You can collect a sequence of commands in a script file (e.g. myscript.sh)

The command sh myscript.sh sequentially executes all commands in this file.
Actually bash is a command language with assignments,

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When making your script file executable by changing the permission

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bits you can run it (with the sh prefix) like any other program (how?).

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bits, you can run it like any other program (how?).

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Have a look at your .profile file a shell script which is executed

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Have a look at your ~/.profile, a shell script which is executed

when you create a new shell (e.g. when opening a new command window).

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