Questions about: bash - страница 2

I'm studying shell scripting with bash and I need to know the difference between () and {}. How does one select between the two when writing a script? (.
This question already has an answer here: How do I delete my commands quickly? 9 answers Ctrl+U will only clean from the cursor to the beginning of the line, so if the cursor is at the end of the line, all the line will be cleaned, and if not, there
I'm running Ubuntu 11. 04. I use the terminal to start a bash session, and I want to add an environment variable: [email protected]:~$ env THEVAR=/example But it's not working
If all you want is a simple word based auto-completion (so no subcommand completion or anything), the complete command has a -W option that just does the right thing. For example, I have the following lines in my . bashrc to autocomplete a program ca
You should get a grip on the Linux grep command. This is part of the on-going 15 Examples series, where 15 detailed examples will be provided for a specific command or functionality. Earlier we discussed 15 practical examples for Linux find command,
I do not think that correct answer can be given without “technical jargon”. Since this question is the first one popping up in Google for the query “what is a login shell” I am providing a more correct answer below: Login shell is simply a shell that
It depends on whether you are using vi(set -o vi) or emacs(set -o emacs) editing mode within your shell. By default, your shell generally defaults to emacs editing mode. In emacs mode, deleting to the end of the line can be accomplished by using the
TL;DR: NO The first command is sudo some-command The second command is some-other-command The command sudo takes the following command and executes it with elevated privileges. The &&, however, doesn't belong to a command and is interpreted b
Try putting this into your . bashrc: shopt -s histappend # append to history, don't overwrite it export PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND" Credit here: https://stackoverflow. com/questions/103944/real-time-history-ex
The #! line is used before the script is run, then ignored when the script runs. You're asking what the difference is between a shebang line and an ordinary comment. A line starting with #! is just as much a comment as any other line that starts with