Bash Input/Output: Difference between revisions
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=Echo Multiple Lines to <tt>stdout</tt>= | =Echo Multiple Lines to <tt>stdout</tt>= | ||
<pre> | |||
cat <<EOF | |||
blah | |||
${some_var} | |||
blah | |||
EOF | |||
</pre> | |||
* It will perform variable substitution. If you don't want that, escape <tt>\${some_var}</tt>. | |||
* <tt>`...`</tt> sequences should be escaped as shown here: <tt>\`...\`</tt> otherwise they will executed before the output is sent to stdout. | |||
* \ will join lines. If you want "\" in the output, then you should escape it: | |||
<pre> | |||
... | |||
blah blah \\ | |||
... | |||
</pre> | |||
=Echo Multiple Lines into a File= | =Echo Multiple Lines into a File= | ||
<pre> | |||
(cat << EOF | |||
blah | |||
EOF | |||
) > /tmp/test.txt | |||
</pre> | |||
Revision as of 02:49, 22 February 2016
Internal
Echo Multiple Lines to stdout
cat <<EOF
blah
${some_var}
blah
EOF
- It will perform variable substitution. If you don't want that, escape \${some_var}.
- `...` sequences should be escaped as shown here: \`...\` otherwise they will executed before the output is sent to stdout.
- \ will join lines. If you want "\" in the output, then you should escape it:
...
blah blah \\
...
Echo Multiple Lines into a File
(cat << EOF blah EOF ) > /tmp/test.txt