To modify a quotation, use the command gchquote:
gchquote [-s start_time] [-e expiration_time] [-d description] [—debug] [-? | —help] [--man] [—quiet] [-v | —verbose] {[-q] quote_id}
Example 2. Changing the expiration time of a quotation
$ gchquote -e "2005-03-01" 1 Successfully modified 1 Quotation