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Files

You can easily read and write to files with bash.

You can write to a file with the following command :

echo "things to write" > file.txt

Note: this overwrite the file.txt if it already exists.
If you want to append to file use the following command.

echo "things to appand" >> file.txt

If you want to a blank line, you need echo -e

echo "things to write" > file.txt echo -e "\n" >> file.txt echo "New line" >> file.txt

Remember that echo already ends with a newline character (even if you don't print one)

Read a file into a variable

testvalue=`cat test.txt`

You read the file test.txt into the variable testvalue.
Those are backticks quotes not single quotes !

 

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