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What does $# mean in shell? - Unix Linux Stack Exchange What does $# mean in shell? I have code such as if [ $# -eq 0 ] then I want to understand what $# means, but Google search is very bad for searching these kinds of things
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
What is the difference between shell, console, and terminal? The shell is the program which actually processes commands and returns output Most shells also manage foreground and background processes, command history and command line editing
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