为什么我编辑不了/etc/aliases ？

[weixin_38055275]

kevintest# ls -l aliases
-rwxrwxrwx  1 root  wheel  1618 Jan 12  2007 aliases

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# $FreeBSD: src/etc/mail/aliases,v 1.21 2005/06/07 03:41:20 maxim Exp $
#       @(#)aliases     5.3 (Berkeley) 5/24/90
#
#  Aliases in this file will NOT be expanded in the header from
#  Mail, but WILL be visible over networks.
#
#       >>>>>>>>>>      The program "newaliases" must be run after
#       >> NOTE >>      this file is updated for any changes to
#       >>>>>>>>>>      show through to sendmail.
#
#
# See also RFC 2142, `MAILBOX NAMES FOR COMMON SERVICES, ROLES
# AND FUNCTIONS', May 1997

# Pretty much everything else in this file points to "root", so
# you would do well in either reading root's mailbox or forwarding
# root's email from here.

# root: [e-mail]

aliases already locked, session is read-only; aliases: unmodified, readonly: line 1