2022-11-04
发表者 Venus
Please login as the user “centos” rather than the user “root”.已关闭评论
就想用root登陆系统！
普通用户登陆以后，执行 sudo -i ，然后编辑 /root/.ssh/authorized_keys 文件，找到
no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command=”echo ‘Please login as the user \”centos\” rather than the user \”root\”.’;echo;sleep 10″
删掉它!
当然ssh服务里也要设置允许root登陆。
2022-10-19
发表者 Venus
nginx绑定大量域名时需要修改的两个参数已关闭评论
nginx在添加量大虚拟主机时重启nginx报错。
nginx: [warn] could not build optimal server_names_hash, you should increase either server_names_hash_max_size: 512 or server_names_hash_bucket_size: 64; ignoring server_names_hash_bucket_size
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
# 添加或修改下面2行
server_names_hash_max_size 4096;
server_names_hash_bucket_size 1024;
include vhost/*.conf;
}
2022-10-18
发表者 Venus
通过单个配置文件实现腾讯云双网卡配置多ip已关闭评论
之前都是用子配置文件方式，比如 ifcfg-eth0:0 ifcfg-eth0:1这种，需要创建多个配置文件。
现在通过单个配置文件实现多ip配置。
# 第一块网卡
[root@VM-0-3-centos network-scripts]# cat ifcfg-eth0 BOOTPROTO=static DEVICE=eth0 HWADDR=52:54:00:4f:c4:e4 ONBOOT=yes PERSISTENT_DHCLIENT=yes TYPE=Ethernet USERCTL=no IPADDR=172.17.0.3 NETMASK=255.255.240.0 GATEWAY=172.17.0.1 IPADDR1=172.17.0.13 NETMASK1=255.255.240.0 IPADDR2=172.17.0.14 NETMASK2=255.255.240.0 IPADDR3=172.17.0.15 NETMASK3=255.255.240.0 IPADDR4=172.17.0.2 NETMASK4=255.255.240.0 IPADDR5=172.17.0.8 NETMASK5=255.255.240.0
# 第二块网卡配置
[root@VM-0-3-centos network-scripts]# cat ifcfg-eth1 BOOTPROTO=static DEVICE=eth1 ONBOOT=yes PERSISTENT_DHCLIENT=yes TYPE=Ethernet USERCTL=no IPADDR=172.17.0.6 NETMASK=255.255.240.0 IPADDR1=172.17.0.11 NETMASK1=255.255.240.0 IPADDR2=172.17.0.12 NETMASK2=255.255.240.0 IPADDR3=172.17.0.16 NETMASK3=255.255.240.0 IPADDR4=172.17.0.4 NETMASK4=255.255.240.0 IPADDR5=172.17.0.5 NETMASK5=255.255.240.0
# 配置策略路由
echo "10 t1" >> /etc/iproute2/rt_tables echo "20 t2" >> /etc/iproute2/rt_tables ip route add default dev eth0 via 172.17.0.1 table 10 ip route add default dev eth1 via 172.17.0.1 table 20 ip rule add from 172.17.0.13 table 10 ip rule add from 172.17.0.14 table 10 ip rule add from 172.17.0.15 table 10 ip rule add from 172.17.0.2 table 10 ip rule add from 172.17.0.3 table 10 ip rule add from 172.17.0.8 table 10 ip rule add from 172.17.0.11 table 20 ip rule add from 172.17.0.12 table 20 ip rule add from 172.17.0.16 table 20 ip rule add from 172.17.0.4 table 20 ip rule add from 172.17.0.5 table 20 ip rule add from 172.17.0.6 table 20
# 测试ip连通性
#!/bin/bash
ip a | grep -o -e 'inet [0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}'|grep -v "127.0.0"|awk '{print $2}' > ip
while read line || [[ -n ${line} ]]
do
line=`curl -s --interface $line -A "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.62" https://ipv4.icanhazip.com/`
echo "ip地址 " $line
done < ip
2022-10-09
发表者 Venus
vmdk转阿里云raw已关闭评论
本地vmware虚拟机的vmdk转成阿里云的raw格式镜像
根据官方文档：https://help.aliyun.com/document_detail/57187.html
D:\>qemu-img convert -f vmdk -O raw 1.vmdk 2.raw qemu-img: error while writing at byte 0: Input/output error
报如上的错误，发工单以后可以通过下面参数转换
qemu-img.exe convert 1.vmdk -O vpc -o subformat=dynamic 2.raw
在等待工单回复过程中找到如下参数转换完成，同样可以导入到镜像。
D:\>qemu-img convert 1.vmdk -f vmdk -O qcow2 2.qcow2
2022-08-23
发表者 Venus
xargs占位符已关闭评论
比如在log目录下有3个文件，文件名为a、b、c，现在需要改名，加上.bak。
[root@iZj6c5o8z3bqyepm9pw4xsZ log]# ll 总用量 0 -rw-r--r-- 1 root root 0 8月 23 09:46 a -rw-r--r-- 1 root root 0 8月 23 09:46 b -rw-r--r-- 1 root root 0 8月 23 09:46 c
通过-I参数指定一个占位符
[root@iZj6c5o8z3bqyepm9pw4xsZ log]# ls | xargs -I filename sh -c "mv filename filename.bak" [root@iZj6c5o8z3bqyepm9pw4xsZ log]# ll 总用量 0 -rw-r--r-- 1 root root 0 8月 23 09:46 a.bak -rw-r--r-- 1 root root 0 8月 23 09:46 b.bak -rw-r--r-- 1 root root 0 8月 23 09:46 c.bak
