>newgrp project_name_old >cp project_name_old/debug.tcl . >exit >newgrp current_project_name >chgrp current_project_name debug.tcl # old script access permission for other users should be modify to current project >chmod 775 debug.tcl Copy old project scripts debug.tcl to current project, let other users in current project to access to debug.tcl.

Linux/Unix file permissions

Permission Types Each file or directory has three basic permission types: read – The Read permission refers to a user’s capability to read the contents of the file. write – The Write permissions refer to a user’s capability to write or modify a file or directory. execute – The Execute permission affects a user’s capability… read more »