1echo [ -neE ] [ arg ... ] 2 Write each arg on the standard output, with a space separating 3 each one. If the -n flag is not present, print a newline at the 4 end. echo recognizes the following escape sequences: 5 6 \a bell character 7 \b backspace 8 \c suppress final newline 9 \e escape 10 \f form feed 11 \n linefeed (newline) 12 \r carriage return 13 \t horizontal tab 14 \v vertical tab 15 \\ backslash 16 \0NNN character code in octal 17 \xNN character code in hexadecimal 18 \uNNNN unicode character code in hexadecimal 19 \UNNNNNNNN 20 unicode character code in hexadecimal 21 22 The -E flag, or the BSD ECHO option, can be used to disable 23 - 24 these escape sequences. In the latter case, -e flag can be used 25 to enable them. 26