- linux - What does $@ mean in a shell script? - Stack Overflow
What does a dollar sign followed by an at-sign (@) mean in a shell script? For example: umbrella_corp_options $@
- Difference between ${} and $() in a shell script - Super User
$(command) is “command substitution” As you seem to understand, it runs the command, captures its output, and inserts that into the command line that contains the $(…); e g , $ ls -ld $(date +%B) txt -rwxr-xr-x 1 Noob Noob 867 Jul 2 11:09 July txt ${parameter} is “parameter substitution” A lot of information can be found in the shell’s man page, bash (1), under the “ Parameter
- bash - Shell equality operators (=, ==, -eq) - Stack Overflow
Shell equality operators (=, ==, -eq) Asked 11 years, 7 months ago Modified 3 years, 1 month ago Viewed 634k times
- shell - How to concatenate string variables in Bash - Stack Overflow
A bashism is a shell feature which is only supported in bash and certain other more advanced shells It will not work under busybox sh or dash (which is bin sh on a lot of distros), or certain other shells like the bin sh provided on FreeBSD
- shell - How do I split a string on a delimiter in Bash? - Stack Overflow
Split string based on delimiter in shell If you can't use bash, or if you want to write something that can be used in many different shells, you often can't use bashisms -- and this includes the arrays we've been using in the solutions above
- 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
- What is the meaning of $? in a shell script? - Unix Linux Stack Exchange
When going through one shell script, I saw the term "$?" What is the significance of this term?
- shell - Redirect stderr and stdout in Bash - Stack Overflow
I want to redirect both standard output and standard error of a process to a single file How do I do that in Bash?
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