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Difference between Login Shell and Non-Login Shell? I understand the basic difference between an interactive shell and a non-interactive shell But what exactly differentiates a login shell from a non-login shell? Can you give examples for uses of
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 shell, etc
What do $? $0 $1 $2 mean in a shell script? - Stack Overflow I often come across $?, $0, $1, $2, etc in shell scripting I know that $? returns the exit status of the last command: echo quot;this will return 0 quot; echo $? But what do the others do? What
shell - What does -- (double dash double hyphen) mean? - Unix . . . More precisely, a double dash (--) is used in most Bash built-in commands and many other commands to signify the end of command options, after which only positional ("non-option") arguments are accepted Example use: Let's say you want to grep a file for the string -v Normally -v will be considered the option to reverse the matching meaning (only show lines that do not match), but with -- you
How to echo shell commands as they are executed - Stack Overflow Special shell variables verbose If set, causes the words of each command to be printed, after history substitution (if any) Set by the -v command line option echo If set, each command with its arguments is echoed just before it is executed For non-builtin commands all expansions occur before echoing