echo

Overview

echo writes its arguments to standard output, separated by spaces, usually followed by a newline. It is the everyday way to print status lines in the shell. Behavior of escapes (-e) and options differs across shells and /bin/echo — for portable formatting prefer printf.

This page stays operator-light. Shell programming depth lives in the Shell scripting parts of this book.

Syntax

echo [options] [string...]

Common Options

Option	Description
-n	No trailing newline
-e	Enable backslash escapes (\n, \t, \\, …) — bash builtin / some echos
-E	Disable escapes (bash default)

BusyBox and non-bash echo may ignore or treat flags differently. When it matters, use printf.

Examples with Explanations

Print text

echo 'Hello'
echo Hello world
echo "User: $USER"

Single quotes preserve literals; double quotes expand variables.

No newline

echo -n 'Prompt: '
# useful before read in interactive snippets

Escapes (bash)

echo -e 'line1\nline2\tcolumn'

Prefer printf 'line1\nline2\tcolumn\n' for scripts you share.

Redirect / append

echo 'enabled=1' > /tmp/flags.conf
echo 'note' >> /tmp/flags.conf

Pipe into other commands

echo 'example.com' | dig +short
echo "$TOKEN" | wc -c

Avoid echo $TOKEN unquoted (word-splitting/globbing).

Show a path or command you are about to run

echo "Installing into $PREFIX"
echo "+ apt install -y curl"

Common in install scripts for operator visibility.

Notes

• echo is often a shell builtin (type echo); /bin/echo may differ.
• Arguments starting with - can be misread as options — use printf '%s\n' "$arg" for arbitrary data.
• echo * expands globs; quote when you mean a literal *.
• Don’t use echo to print binary-safe data; use printf or cat.

Related Commands

• printf — reliable formatting
• cat — write multi-line or file contents
• tee — print and log
• yes — repeat a line

Additional Resources

• help echo (bash)
• man echo