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.

To combine stderr and stdout into the stdout stream, we append this to a command: 2>&1 For example, the following command shows the first few errors from compiling main.cpp: g++ …

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.

For a command, if using - as an argument in place of a file name will mean STDIN or STDOUT. But in this example, it creates a file with the name -: echo hello > - How can I make - in this …

Shell equality operators (=, ==, -eq) Asked 12 years ago Modified 3 years, 6 months ago Viewed 648k times

Start Windows PowerShell with the "Run as Administrator" option. Only members of the Administrators group on the computer can change the execution policy. Enable running …

231 A subshell starts out as an almost identical copy of the original shell process. Under the hood, the shell calls the fork system call 1, which creates a new process whose code and memory …

How do I call an external command within Python as if I had typed it in a shell or command prompt?

… or an introductory guide to robust filename handling and other string passing in shell scripts. I wrote a shell script which works well most of the time. But it chokes on some inputs (e.g. on …

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 …