Title: Theory / Unimportant / CS / command line / admin / sh

Instruction: sh
Page: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html
Effect: Start the standard Posix shell

Fla: -c
Effect: Read commands from the command_string operand.
Page: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html
Prefix: sh
Extra: Set the value of special parameter 0 (see Special Parameters) from the value of the command_name operand and the positional parameters ($1, $2, and so on) in sequence from the remaining argument operands. No commands shall be read from the standard input.

Fla: -s
Effect: Read commands from the standard input.
Page: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html
Prefix: sh

Fla: - file
Effect: Read and execute content of file
Page: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sh.html
Prefix: sh