11.10. 配置文件

11.10.2.1. /etc/resolv.conf

/etc/resolv.conf 指示了 FreeBSD 如何访问域名系统(DNS)。

resolv.conf 中最常见的记录是：

一个典型的 resolv.conf 文件：

search example.com
nameserver 147.11.1.11
nameserver 147.11.100.30

如果您在使用 DHCP，dhclient(8) 经常使用从 DHCP 服务器接受来的信息重写 resolv.conf。

11.10.2.2. /etc/hosts

/etc/hosts 是 Internet 早期使用的一个简单文本数据库。 它结合 DNS 和 NIS 提供名字到 IP 地址的映射。 通过局域网连接的机器可以用这个简单的命名方案来替代设置一个 named(8) 服务器。另外，/etc/hosts 也可以提供一个 Internet 名称的本地纪录以减轻需要从外部查询带来的负担。

# $FreeBSD$
#
# Host Database
# This file should contain the addresses and aliases
# for local hosts that share this file.
# In the presence of the domain name service or NIS, this file may
# not be consulted at all; see /etc/nsswitch.conf for the resolution order.
#
#
::1                     localhost localhost.my.domain myname.my.domain
127.0.0.1               localhost localhost.my.domain myname.my.domain

#
# Imaginary network.
#10.0.0.2               myname.my.domain myname
#10.0.0.3               myfriend.my.domain myfriend
#
# According to RFC 1918, you can use the following IP networks for
# private nets which will never be connected to the Internet:
#
#       10.0.0.0        -   10.255.255.255
#       172.16.0.0      -   172.31.255.255
#       192.168.0.0     -   192.168.255.255
#
# In case you want to be able to connect to the Internet, you need
# real official assigned numbers.  PLEASE PLEASE PLEASE do not try
# to invent your own network numbers but instead get one from your
# network provider (if any) or from the Internet Registry (ftp to
# rs.internic.net, directory `/templates').
#

/etc/hosts 用简单的格式：

[Internet address] [official hostname] [alias1] [alias2] ...

例如：

10.0.0.1 myRealHostname.example.com myRealHostname foobar1 foobar2

参考 hosts(5) 以获得更多信息。

11.10.3.1. syslog.conf

syslog.conf 是 syslogd(8) 程序的配置文件。 它指出了的 syslog 哪种信息类型被存储在特定的日志文件中。

# $FreeBSD$
#
#       Spaces ARE valid field separators in this file. However,
#       other *nix-like systems still insist on using tabs as field
#       separators. If you are sharing this file between systems, you
#       may want to use only tabs as field separators here.
#       Consult the syslog.conf(5) manual page.
*.err;kern.debug;auth.notice;mail.crit          /dev/console
*.notice;kern.debug;lpr.info;mail.crit;news.err /var/log/messages
security.*                                      /var/log/security
mail.info                                       /var/log/maillog
lpr.info                                        /var/log/lpd-errs
cron.*                                          /var/log/cron
*.err                                           root
*.notice;news.err                               root
*.alert                                         root
*.emerg                                         *
# uncomment this to log all writes to /dev/console to /var/log/console.log
#console.info                                   /var/log/console.log
# uncomment this to enable logging of all log messages to /var/log/all.log
#*.*                                            /var/log/all.log
# uncomment this to enable logging to a remote log host named loghost
#*.*                                            @loghost
# uncomment these if you're running inn
# news.crit                                     /var/log/news/news.crit
# news.err                                      /var/log/news/news.err
# news.notice                                   /var/log/news/news.notice
!startslip
*.*                                             /var/log/slip.log
!ppp
*.*                                             /var/log/ppp.log

参考 syslog.conf(5) 手册页以获得更多信息

11.10.3.2. newsyslog.conf

newsyslog.conf 是一个通常用 cron(8) 计划运行的 newsyslog(8) 程序的配置文件。 newsyslog(8) 指出了什么时候日志文件需要打包或者重新整理。 比如 logfile 被移动到 logfile.0，logfile.0 被移动到 logfile.1 等等。另外，日志文件可以用 gzip(1) 来压缩，它们是这样的命名格式： logfile.0.gz，logfile.1.gz 等等。

newsyslog.conf 指出了哪个日志文件要被管理，要保留多少和它们什么时候被创建。 日志文件可以在它们达到一定大小或者在特定的日期被重新整理。

# configuration file for newsyslog
# $FreeBSD$
#
# filename          [owner:group]    mode count size when [ZB] [/pid_file] [sig_num]
/var/log/cron                           600  3     100  *     Z
/var/log/amd.log                        644  7     100  *     Z
/var/log/kerberos.log                   644  7     100  *     Z
/var/log/lpd-errs                       644  7     100  *     Z
/var/log/maillog                        644  7     *    @T00  Z
/var/log/sendmail.st                    644  10    *    168   B
/var/log/messages                       644  5     100  *     Z
/var/log/all.log                        600  7     *    @T00  Z
/var/log/slip.log                       600  3     100  *     Z
/var/log/ppp.log                        600  3     100  *     Z
/var/log/security                       600  10    100  *     Z
/var/log/wtmp                           644  3     *    @01T05 B
/var/log/daily.log                      640  7     *    @T00  Z
/var/log/weekly.log                     640  5     1    $W6D0 Z
/var/log/monthly.log                    640  12    *    $M1D0 Z
/var/log/console.log                    640  5     100  *     Z

参考 newsyslog(8) 手册页以获得更多信息。