centos ubuntu dig nslookup yum install -y bind-utils telnet yum install -y telnet ifconfig route arp netstat net-tools

123456yum clean allyum makecacheyum list --showduplicates | grep libseccompyum install --downloadonly --downloaddir . libseccompyum install --downloadonly --downloaddir . libseccomp* 123456789101112

123456# echo $HISTSIZE5# sed -i 's/^HISTSIZE=5/HISTSIZE=200/' /etc/profile# source /etc/profile # echo $HISTSIZE200

123456# echo $HISTSIZE5# sed -i 's/^HISTSIZE=5/HISTSIZE=200/' /etc/profile# source /etc/profile # echo $HISTSIZE200

12345678910for k, v in SelfNodeVariable.regionImageRegistryResolution { { data: """ test3.host """ mode: &q

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方法11234if [ ! -d "/root/test" ]; then echo -e `date '+%Y-%m-%d %H:%M:%S %A'` "filepath doesn't exist " mkdir -p /root/testfi 方法212345filePath="test"i

———- 复习笔记 ———-复习笔记 20230516(二)路由协议RIP udp 520OSPF ipISIS 链路层BGP tcp 179 ospf和isis 链路状态协议 ospf使用hello报文维持邻居关系isis也使用hello协议寻找毗邻节点 ———- 上午题 ———-2019年5月上午题 20230513(六) 65/752019年11月上午题 2