![]() If the variables contain spaces or other unusual characters it will probably cause the script to fail. The reason for this is explained by 8jean in another answer. ![]() The main difference between XTerm and Terminal is that the GNOME Terminal - Wikipedia has more features, while XTerm is minimalistic (though it has features that are't in gnome-terminal, but they are more advanced). Take particular note of the double-quotes used to wrap the variables. UXTerm is XTerm with support to Unicode characters. # Symbolic link specific commands go here. So symbolic links may have to be treated differently, if subsequent commands expect directories: if then Will produce the error message: rmdir: failed to remove `symlink': Not a directory running this: ln -s "$ACTUAL_DIR" "$SYMLINK" However, as Jon Ericson points out, subsequent commands may not work as intended if you do not take into account that a symbolic link to a directory will also pass this check.Į.g. # Control will enter here if $DIRECTORY doesn't exist. Or to check if a directory doesn't exist: if then # Control will enter here if $DIRECTORY exists. To check if a directory exists in a shell script, you can use the following: if then As an example: if I run tmux as a program within xterm, I get different behavior than when I invoke tmux in a running xterm instance. The main difference between XTerm and Terminal is that the gnome-terminal has more features, while XTerm is minimalistic (though it has features that are't in gnome-terminal, but they are more advanced). UXTerm is XTerm with support to Unicode characters. Now you have programs such as Gnome Terminal which launches a window in a Gnome windowing environment which will run a shell into which you can enter commands. As unix/linux systems added better multiprocessing and windowing systems, this terminal concept was abstracted into software. Decades ago, this was a physical device consisting of little more than a monitor and keyboard. These features (and many more) are standard in bash, the most common shell in modern linux systems.Ī terminal refers to a wrapper program which runs a shell. ![]() Most shells also manage foreground and background processes, command history and command line editing. The shell is the program which actually processes commands and returns output. The differences are in how they interact with each other. In linux they can all look the same from the point of view of the user at the keyboard. ![]()
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