Modify all bash commands through a program before executing them
I am trying to create a program which require such feature. The flow will be like:
bash
How do I set a user’s default .bashrc file?
On Ubuntu 10.4 I have edited the /etc/bash.bashrc file to set some variables like the command history size (HISTSIZE=5000), however if I create a new users Ubuntu by default gives them a .bashrc file in their home directory with this set as HISTSIZE=1000 which is overriding mine. How can I change the default .bashrc file that is created?
Performance differences between pipelines and process substitution
I tend to use pipelines in my bash scripts over process substitution in most situations, especially in cases of using multiple sets of commands as it seems more readable to do ... | ... | ... over ... < <(... < <(...)).
How do you colorize only some keywords for a bash script?
I am running some unit test code. The unit test code outputs regular text. There is a lot of the text so I want to highlight for the user important keywords.
Run a command when system is idle and when is active again
I want to run a command when the user becomes inactive (the system is idle). For example:
Bash script: check if a file is a text file
From the fact that it says file $attachment
rather than file "$attachment",
I guess your script cannot handle filenames that contain spaces.
But, be advised that filenames can contain spaces,
and well-written scripts can handle them. Note, then:
How can I find a rogue alias declaration?
I’m trying to find where a specific alias has been declared. I’ve searched all the usual places I know to look for aliases:
How to know if extglob is enabled in the current bash session?
I have a bash terminal open. I want to find out whether the option extglob is enabled or disabled in this session, before I change its value. How can I do this?
What does it mean to have a $”dollarsign-prefixed string” in a script?
I just saw this in an init script:
How to make reading and writing the same file in the same pipeline always “fail”?
Say I have the following script: