bash - What is the purpose of "&&" in a shell command? - Stack Overflow
...Furthermore, you also have which is the logical or, and also which is just a separator which doesn't care what happend to the command before....
https://stackoverflow.com/questions/4510640/what-is-the-purpose-of-in-a-shell-command
bash - What are the special dollar sign shell variables ... - Stack ...
...In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return the PID of the process which backgrounded myprog......
https://stackoverflow.com/questions/5163144/what-are-the-special-dollar-sign-shell-variables
What's the difference between <<, <<< and < < in bash?
...Here-strings in bash are implemented via temporary files, usually in the format /tmp/sh-thd.
https://askubuntu.com/questions/678915/whats-the-difference-between-and-in-bash
bash - Shell equality operators (=, ==, -eq) - Stack Overflow
...The reason is that Bash is untyped. The -eq causes the strings to be interpreted as integers if possible including base conversion: ... And 0 if Bash thinks it is just a string: ... So [[ "yes" -eq "no" ]] is equivalent to [[ 0 -eq 0 ]] Last note: Many of the Bash specific extensions to the Test Constructs are not POSIX and therefore may fail ......
https://stackoverflow.com/questions/20449543/shell-equality-operators-eq
What does $# mean in bash? - Ask Ubuntu
...Furthermore, when you use bash -c, behavior is different than if you run an executable shell script, because in the latter case the argument with index 0 is the shell command used to invoke it....
https://askubuntu.com/questions/939620/what-does-mean-in-bash
Meaning of $? (dollar question mark) in shell scripts
...From the manual: (acessible by calling man bash in your shell) ? Expands to the exit status of the most recently executed foreground pipeline. By convention an exit status of 0 means success, and non-zero return status means failure. Learn more about exit statuses on wikipedia....
https://stackoverflow.com/questions/7248031/meaning-of-dollar-question-mark-in-shell-scripts
shell - Bash regex =~ operator - Stack Overflow
...The =~ operator is a regular expression match operator. This operator is inspired by Perl's use of the same operator for regular expression matching. The [[ ]] is treated specially by bash; consider that an augmented version of [ ] construct: [ ] is actually a shell built-in command, which, can actually be implemented as an external command. Look at your /usr/bin, there is most likely a ......
https://stackoverflow.com/questions/19441521/bash-regex-operator
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 $@...
https://stackoverflow.com/questions/9994295/what-does-mean-in-a-shell-script
arguments - What is $@ in Bash? - Stack Overflow
...I reckon that the handle $@ in a shell script is an array of all arguments given to the script. Is this true? I ask because I normally use search engines to gather information, but I can't google f......
https://stackoverflow.com/questions/3898665/what-is-in-bash
What does &> do in bash? - Stack Overflow
...All about redirection in bash What does &> do in bash? Regarding the erroneous ... Can someone clarify the man page and explain exactly what is happening with this syntax? Yes, I can....
https://stackoverflow.com/questions/24793069/what-does-do-in-bash