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- How to check if a string contains a substring in Bash
The -- argument is pure POSIX paranoia, used to protected against input strings similar to options, such as --abc or -a Note: In a tight loop this code will be much slower than using internal Bash shell features, as one (or two) separate processes will be created and connected via pipes
- Why was the word shell used to describe a command-line interface?
The shell is defined thus: The Multics command processor used to be called the shell This program is passed a command line for execution by the listener; it parses the line into a command name and arguments, locates the command and initiates it, and calls the command program with arguments that are PL I character strings
- View full history for powershell, not just current session
Powershell now handily remembers history from previous sessions, and I can get to earlier commands simply by using the up-arrow What I would like though is to be able to display this history, but
- How do I concatenate strings and variables in PowerShell?
This quote rule and demo for concatenation is applicable to 'nix shell scripting (e g Bash), in addition to PowerShell The portability factor alone earns my vote
- shell script - Deleting older log files - Unix Linux Stack Exchange
You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
- Difference between ${} and $() in a shell script - Super User
Difference between $ {} and $ () in a shell script Ask Question Asked 10 years, 1 month ago Modified 5 months ago
- shell - How to assign the output of a Bash command to a variable . . .
For example, on ksh93, JOBMAX changes the number of background tasks that can be running at once; it's not hard to imagine a shell using NUM_PROCS for something similar
- shell - echo bytes to a file - Unix Linux Stack Exchange
The thing is echo is usually a builtin command So this is up to the shell you are using The linux default being bash; \xHH is properly displaying a character through its hexadecimal value
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