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Can linux cat command be used for writing text to file?


Question

Is something like this:

cat "Some text here." > myfile.txt

Possible? Such that the contents of myfile.txt would now be overwritten to:

Some text here.

This doesn't work for me, but also doesn't throw any errors.

Specifically interested in a cat-based solution (not vim/vi/emacs, etc.). All examples online show cat used in conjunction with file inputs, not raw text...

2013/06/14
1
145
6/14/2013 7:10:22 PM

Accepted Answer

That's what echo does:

echo "Some text here." > myfile.txt
2013/06/14
187
6/14/2013 7:11:29 PM


Here's another way -

cat > outfile.txt
>Enter text
>to save press ctrl-d
2015/05/02

I use the following code to write raw text to files, to update my CPU-settings. Hope this helps out! Script:

#!/bin/sh

cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor <<EOF
performance
EOF

cat > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor <<EOF
performance
EOF

This writes the text "performance" to the two files mentioned in the script above. This example overwrite old data in files.

This code is saved as a file (cpu_update.sh) and to make it executable run:

chmod +x cpu_update.sh

After that, you can run the script with:

./cpu_update.sh

IF you do not want to overwrite the old data in the file, switch out

cat > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor <<EOF

with

cat >> /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor <<EOF

This will append your text to the end of the file without removing what other data already is in the file.

2016/02/12

cat > filename.txt

enter the text until EOF for save the text use : ctrl+d

if you want to read that .txt file use

cat filename.txt

and one thing .txt is not mandatory, its for your reference.

2015/08/24

For text file:

cat > output.txt <<EOF
some text
some lines
EOF

For PHP file:

cat > test.php <<PHP
<?php
echo "Test";
echo \$var;
?>
PHP
2019/07/16

You can do it like this too:

[email protected]: $ cat<<EOF > file.txt
$ > 1 line
$ > other line
$ > n line
$ > EOF
[email protected]: $ _

I believe there is a lot of ways to use it.

2018/03/22