======TPB0======

=====TOOLBOX=====

  * **file**(**1**)
  * **uudecode**(**1**)
  * **xxd**
  * **tr**
  * **gzip, xzip, bzip2, zip, tar & ar**
  * **chmod**
  * **sort**
  * **cpio**
  * **rev**
=====determining the state of data=====

=====noticing error messages=====

=====using error messages to inform tool input=====

=====uuencoded data=====

=====impacts of permissions=====

Some files are not readable or writeable. Use chmod to change the permissions to allow yourself to read and write. The command to change permissions is chmod. To give yourself reading and writing abilities, and give no one else, do chmod 600.