Exporting string in bash

Question

I would like to export an encrypted string to a file that already has some content.

How can i delete the content of this file and add my string?

I tried cat but that did not work. Thanks for your help!

score 0 · Answer 1 · answered Sep 16 '13 at 16:58

0

Use the > redirection operator, it will wipe out the target file. Use the >> to append to the end of the target file

cat encrypted_file.txt > desired_file.txt

answered Sep 16 '13 at 16:58

Bradley Bossard

I think i neet to add some more information. I got a config-file to save username and password. Now i use a .sh to read the Logindata. I use an encryption command to encrypt my passwd variable. Now i want to export the declared variables as strings to the existing config-file. In case of existing content i would like to replace the old content with the new one. I hope you understand my broken english. – WorstCase Sep 16 '13 at 17:06

score 0 · Accepted Answer · answered Sep 16 '13 at 17:00

In Bash you can easily redirect a string into a file with bash like this

echo "This is my string" > filename

A single > will replace the contents, >> will append the string to the end of the file.

For more information have a look at the bash manual regarding Redirection.

score 0 · Answer 3 · answered Sep 16 '13 at 17:29

0

try this approach :

 while read user pass;do 
    echo "$user,$pass"
    # do encrypt or other operation before echo 
  done <configfile >configfile.new

answered Sep 16 '13 at 17:29

michael501

3 Answers3