Give the command line that restricts access of the RCS log file RCS/input.c,v file so that only users dale and kent can edit any version of this file. What is the command line for taking editing rights away from the users ahmed and tomn?
Under RCS, the command line rcs -adale,kent -eahmed,tomn input.c gives dale and kent the permission to check out an editable version of the input.c file and takes away the editing rights from the users ahmed and tomn. You can perform the same task with two commands, as shown below.
```
$ rcs –adale,kent input.c
$ rcs –eahmed,tomn input.c
$
```
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