01-05-2019
Welcome to the forum.
Not sure I understand the problem. Would you please carefully proofread your post and correct typos and logical errors (using the "edit" button at the lower right)? Like the ABC?DEF/*.done - is that a (wildcarded) directory or a sequence of files?
You don't seem to cd to anywhere, so why should it (what is it?) go "back to the original folder"? What exactly "isnt working"? Show the error messages.
And, give some data, like real filenames, as your sample "FilePrefix_20181120_075221_3.done" doesn't go well with the "${file:0:31}" shell expansion. Is your target directory meant to be an absolute path? Did you realize that your second expansion "${file##*.}" doesn't do anything as there's no . left in the file name?
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RBASH(1) General Commands Manual RBASH(1)
NAME
rbash - restricted bash, see bash(1)
RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a filename containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO
bash(1)
GNU Bash-4.0 2004 Apr 20 RBASH(1)