old_conf と new_conf を比較する場合。
diff -u -wb \
<(grep -vE '^([ \t]*#|^[ \t]*$)' old_conf | sort) \
<(grep -vE '^([ \t]*#|^[ \t]*$)' new_conf | sort)
例: vsftpのconf比較
$ diff -u -wb \ > <(grep -vE '^([ \t]*#|^[ \t]*$)' old | sort) \ > <(grep -vE '^([ \t]*#|^[ \t]*$)' new | sort) --- /dev/fd/63 2016-11-25 18:25:44.000000000 +0900 +++ /dev/fd/62 2016-11-25 18:25:44.000000000 +0900 @@ -1,18 +1,27 @@ +allow_writeable_chroot=YES anonymous_enable=NO ascii_download_enable=YES ascii_upload_enable=YES -chroot_local_user=YES +chmod_enable=YES +chroot_list_enable=YES +chroot_list_file=/etc/vsftpd/chroot_list +chroot_local_user=NO connect_from_port_20=YES dirmessage_enable=YES dual_log_enable=YES force_dot_files=YES -listen=NO +listen=YES local_enable=YES -local_umask=022 +local_umask=002 pam_service_name=vsftpd +pasv_max_port=1520 +pasv_min_port=1500 tcp_wrappers=YES use_localtime=YES +user_config_dir=/etc/vsftpd/user_conf +userlist_deny=NO userlist_enable=YES +userlist_file=/etc/vsftpd/user_list write_enable=YES xferlog_enable=YES xferlog_std_format=YES
