dc_shell/pt_shell : arrow/tab key not working

Issue:

                                 PrimeTime (R)

               Version Q-2019.12-SP1 for linux64 - Jan 14, 2020

                    Copyright (c) 1988 - 2020 Synopsys, Inc.
   This software and the associated documentation are proprietary to Synopsys,
 Inc. This software may only be used in accordance with the terms and conditions
 of a written license agreement with Synopsys, Inc. All other use, reproduction,
            or distribution of this software is strictly prohibited.
Warning: Cannot use command line editor for terminal type 'xterm-256color'. (CLE-100)
pt_shell> 

And could not use arrow/tab key in pt_shell.

Solved :  add "setenv TERM xterm"  in ~/.cshrc