System Services

1.SSH: Secure Shell

can copy files securely
#scp host:/etc/hosts /etc/hosts

can execute commands remotely
#ssh root@host 'ifconfig eth0'

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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

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Kernel

three kernel
. regular (Kernel): one or more processor but 4GB of Ram and less
. PAE (Kernel-PAE): multiple processor and up to 16GB of Ram
. Xen (Kernel-xen): needed for virtualization


Modules

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