linux网络基础与计划任务(尚观学习笔记)

[root@station230 ~]# ifconfig eth0:0 192.168.100.254/25
[root@station230 ~]# ifconfig eth0 down
[root@station230 ~]# ifconfig eth0 up
[root@station230 ~]# ifdown eth0
[root@station230 ~]# ifup eth0

[root@station230 ~]# vim /etc/sysconfig/network

DEVICE=eth0
BOOTPROTO=static
HWADDR=40:16:9f:f3:53:b4
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=192.168.1.253

/usr/share/doc/initscripts-8.45.30/sysconfig.txt

[root@station230 ~]# ping -s 1000  -c 1 192.168.100.253

[root@station230 ~]# arp -a
[root@station230 ~]# arping 192.168.100.51
ARPING 192.168.100.51 from 192.168.100.253 eth0
Unicast reply from 192.168.100.51 [00:E0:4C:14:F4:A5]  0.633ms

[root@station230 ~]# arp -s 192.168.100.51 00:E0:4C:14:F4:A5
 

[root@station230 ~]# arp -d 192.168.100.51
 

[root@station230 ~]# vim /etc/ethers
00:E0:4C:14:F4:A5  192.168.100.51

[root@station230 ~]# route -n
[root@station230 ~]# route add default gw 192.168.100.1
[root@station230 ~]# route add -net 192.168.254.0/24 gw 192.168.100.1
[root@station230 ~]# route add -host 192.168.200.100 gw 192.168.100.1

[root@station230 Desktop]# rpm -qa | grep dhc
dhcp-3.0.5-23.el5
dhcp-devel-3.0.5-23.el5
dhclient-3.0.5-23.el5
[root@station230 Desktop]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample  /etc/dhcpd.conf
cp：是否覆盖“/etc/dhcpd.conf”? y

[root@station230 ~]# /etc/init.d/syslog restart
关闭内核日志记录器：   [确定]
关闭系统日志记录器：   [确定]
启动系统日志记录器：   [确定]
启动内核日志记录器：   [确定]

[root@station230 log]# pwd
/var/log
message   系统日志文件
wtmp   用last命令查看
utmp    用who    w   users
lastlog    用lastlog命令查看
secure
boot.log
dmesg

xferlog   vsftp的日志文件
cron
mail 

debug, info, notice, warn-ing, warn (same as warning)
err,error (same as err) 
crit, alert,emerg,  panic  (same  as  emerg).
[root@station230 log]# man 5 syslog.conf

[root@station230 log]# vim /etc/syslog.conf
*.*    /var/log/mylog
mail.info
mail.=info
mail.!info

[root@station230 log]# touch mylog
[root@station230 log]# chmod 777 mylog
[root@station230 log]# tail -f mylog

[root@station230 log]# /etc/init.d/syslog restart

[root@station230 log]# tail -f mylog
Sep 16 11:40:36 station230 syslogd 1.4.1: restart (remote reception).
Sep 16 11:40:36 station230 kernel: klogd 1.4.1, log source = /proc/kmsg started

/etc/syslog.conf
*.*      @192.168.100.51
 

[root@station230 log]# vim /etc/sysconfig/syslog
SYSLOGD_OPTIONS="-m 0 -r"    加-r

/etc/init.d/syslog restart

/etc/logrotate.conf
全局
局部

/etc/init.d/logrotate restart
/bin/kill -HUP `cat /var/run/syslogd.pid 2> /dev/null` 2> /dev/null || true

kill  -1  4487