2006隨手札記

Lab1

1.安裝kernel-doc
2./usr/share/doc/$(uname-r)/Documentation/networking/ip-sysctl.txt
3.value : net.ipv4.icmp_echo_ignore_all
4.寫入/proc

5. 寫入/etc/sysctl.conf
6. load sysctl.conf


[root@server118 ~]# sysctl net.ipv4.icmp_echo_ignore_all
net.ipv4.icmp_echo_ignore_all = 0
[root@server118 ~]# sysctl -w net.ipv4.icmp_echo_ignore_all=1
net.ipv4.icmp_echo_ignore_all = 1
[root@server118 ~]# sysctl net.ipv4.icmp_echo_ignore_all
net.ipv4.icmp_echo_ignore_all = 1

由server測試
[root@server1 ~]# ping -c4 192.168.0.118
PING 192.168.0.118 (192.168.0.118) 56(84) bytes of data.

--- 192.168.0.118 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3002ms


%寫入/etc/sysctl.conf
% #sysctl -p
開機時就會自動套用設定

Lab2

#top
#vmstat -s
#cat /proc/meminfo
#lspci
#lsmod
#hal-device