Display message on screen, writes each given STRING to standard output, with a space between each and a newline after the last one.
Syntax echo [options]... [String]... Options -n Do not output a trailing newline. -E Disable the interpretation of the following backslash-escaped characters. -e Enable interpretation of the following backslash-escaped characters in each String: \a Alert (bell) \b Backspace \c Suppress trailing newline \e Escape \E Escape
\f Form feed \n New line \r Carriage return \t Horizontal tab \v Vertical tab \\ Backslash \0nnn The eight-bit character whose value is the octal value nnn (zero to three octal digits) if nnn is not a valid octal number, it is printed literally. \xHH The eight-bit character whose value is the hex value HH (one or two hex digits) \uHHHH The Unicode (ISO/IEC 10646) character whose value is the hex value HHHH (one to four hex digits) \UHHHHHHHH The Unicode (ISO/IEC 10646) character whose value is the hex value HHHHHHHH (one to eight hex digits)
This is a BASH shell builtin, to display your local syntax from the bash prompt type: help echo
There is also an echo utility (man echo) , but the shell built-in version will generally take precedence.
echo "Hello World"
DEMO=Testing123
echo "$DEMO"
# Testing123
echo "with quotes we can echo
several lines at a time"
Echo can also display in color by using Escape sequences for foreground (30..37) and background (40..47) colours.
$ COL_BLUE="\x1b[34;01m"
$ COL_RESET="\x1b[39;49;00m"
$ echo -e $COL_BLUE"Important Message: "$COL_RESET"This is a message"
Here is a shell script to display all the color combinations:
#!/bin/bash # echo ---Bg---40---41---42---43---44---45---46---47 for i in {30..37} # foreground do echo -n -e fg$i- for j in {40..47} # background do echo -n -e '\E['$i';'$j'm SS64' tput sgr0 # Reset text attributes to normal without clear done echo # newline done echo -- Clear BG -- for n in {30..37} # foreground do echo -e fg$n '\E['$n';'01'm SS64' tput sgr0 # Reset text attributes to normal without clear done
“The only thing that helps me pass the time away; is knowing I'll be back at Echo Beach some day” ~ Martha and the Muffins
head - Output the first part of file(s).
less - Display output one screen at a time.
more - Display output one screen at a time.
notify-send - Send desktop notifications.
pg - Display one page at a time.
tee - Redirect output to multiple files.
Equivalent Windows command: ECHO - Display message on screen.