SHELL - HOW CAN I COMPARE NUMBERS IN BASH? - STACK OVERFLOW
compare_nums() { # Function to compare two numbers (float or integers) by using AWK. # The function will not print anything, but it will return 0 (if the comparison is true) or 1 # (if the … From stackoverflow.com
WHAT IS THE PURPOSE OF THE : (COLON) GNU BASH BUILTIN?
Jul 12, 2010 Special built-ins are required to be built into the shell; Regular built-ins are only "typically" built in, but it isn't strictly guaranteed. There usually shouldn't be a regular program … From stackoverflow.com
WHAT ARE THE SPECIAL DOLLAR SIGN SHELL VARIABLES? - STACK OVERFLOW
Sep 14, 2012 $0 is the name of the shell or shell script. Most of the above can be found under Special Parameters in the Bash Reference Manual. Here are all the environment variables set … From stackoverflow.com
SHELL - DIFFERENCE BETWEEN SH AND BASH - STACK OVERFLOW
Shell - "Shell" is a program, which facilitates the interaction between the user and the operating system (kernel). There are many shell implementations available, like sh, Bash, C shell, Z … From stackoverflow.com
WHAT DOES $# MEAN IN SHELL? - UNIX & LINUX STACK EXCHANGE
You can always check the man page of your shell. man bash says: Special Parameters # Expands to the number of positional parameters in decimal. Therefore a shell script can check … From unix.stackexchange.com
REGEX - MEANING OF "=~" OPERATOR IN SHELL SCRIPT - STACK OVERFLOW
Sep 17, 2012 The return value is 0 if the string matches the pattern, and 1 otherwise. If the regular expression is syntactically incorrect, the conditional expression's return value is 2. If … From stackoverflow.com
DIFFERENCE BETWEEN $ {} AND $ () IN A SHELL SCRIPT - SUPER USER
The above (along with many more forms of ${parameter…something_else} constructs) are discussed at greater length in the shell’s man page, bash(1). A Note on Quotes. Note that you … From superuser.com
LINUX - WHAT DOES $@ MEAN IN A SHELL SCRIPT? - STACK OVERFLOW
Apr 3, 2012 The shell splits tokens based on the contents of the IFS environment variable. Its default value is \t\n; i.e., whitespace, tab, and newline. Expanding "$@" gives you a pristine … From stackoverflow.com
WHAT IS THE $? (DOLLAR QUESTION MARK) VARIABLE IN SHELL SCRIPTING?
The shell treats several parameters specially. These parameters may only be referenced; assignment to them is not allowed. [...]? Expands to the exit status of the most recently … From stackoverflow.com
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