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- echo [ -n ] [ arg ... ]
- Write each arg on the standard output, with a space
- separating each one. If the -n flag is not pre-
- sent, print a newline at the end. echo recognizes
- the following escape sequences:
- \a bell character
- \b backspace
- \c don't print an ending newline
- \e escape
- \f form feed
- \n newline
- \r carriage return
- \t horizontal tab
- \v vertical tab
- \\ backslash
- \nnn character code in octal, with a maximum of
- four digits. A non-octal digit terminates
- the number. It must start with zero.
-