虚拟机初始化

秒速五厘米 2022-10-08 00:58 155阅读 0赞

解决ssh登录linux速度慢的问题(以centos7为例)

解决步骤:

先备份/etc/ssh/sshd\_config,备份命令为

cp /etc/ssh/sshd\_config /etc/ssh/sshd\_config.bak

1.su                                    (以root用户登录)

2.vi /etc/ssh/sshd\_config      (编辑配置文件)  
PermitRootLogin yes

3.输入 / ,查找GSSAPIAuthentication 赋值为no

4.输入 /，查找UseDNS,赋值为 no(该项默认不启用的，要把前面的\#删除掉)

5.最后输入!wq保存文件并退出

6.重启systemctl restart sshd

1.更改hostname

vi /etc/hostname

2.更改网络配置

静态ip配置

vi /etc/sysconfig/network-scripts/ifcfg-ens33

BOOTPROTO=static

ONBOOT=yes  
IPADDR=192.168.48.X  
GATEWAY=192.168.48.2  
NETMASK=255.255.255.0

DNS1=192.168.48.70  
DNS2=1.2.4.8  
DNS3=210.2.4.8  
3.初始化yum源

yum install -y wget
    cd /etc/yum.repos.d/
    mv CentOS-Base.repo CentOS-Base.repo.back
    wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
    yum clean all
    yum makecache

yum install yum-utils -y

安装epel源

yum install -y epel-release  
yum list docker --show-duplicates

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

uname -a 内核版本查看

free -m 查看内存

永久关闭selinux

sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config  && setenforce 0

关闭 swap 分区

sed -i '/ swap / s/^$.*$$/#\1/g' /etc/fstab

编辑/etc/hosts

cat >> /etc/hosts << EOF
     192.168.48.61 master 
     192.168.48.62 node01 
     192.168.48.63 node02
     EOF

关闭防火请

systemctl stop firewalld

systemctl disable firewalld

yum install -y net-tools wget nmap  tree telnet  sysstat lrzsz dos2unix bind-utils

yum install -y bind

rpm -qa bind

bind 配置

/etc/named.conf

listen-on port 53 \{ 192.168.48.71; \};

allow-query     \{ any; \};  
forwarders      \{ 192.168.48.2; \};  
dnssec-enable no;  
dnssec-validation no;

/etc/name/named.rfc1912.zones

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70][]

zone "host.com" IN {
            type  master;
            file  "host.com.zone";
            allow-update { 192.168.48.70; };
    };

zone "od.com" IN {
            type  master;
            file  "od.com.zone";
            allow-update { 192.168.48.70; };
    };

区域数据配置

/var/named/host.com.zone

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 1][]

$ORIGIN host.com.
    $TTL 600	; 10 minutes
    @			IN SOA	ns1.host.com. dnsadmin.host.com. (
    				2018121601 ; serial
    				10800      ; refresh (3 hours)
    				900        ; retry (15 minutes)
    				604800     ; expire (1 week)
    				86400      ; minimum (1 day)
    				)
    				NS   dns.host.com.
    $TTL 60	; 1 minute
    dns                             A    192.168.48.70
    HDSS7-70                        A    192.168.48.70
    HDSS7-71                        A    192.168.48.71
    HDSS7-72                        A    192.168.48.72

/var/named/od.com.zone

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 2][]

$ORIGIN od.com.
    $TTL 600	; 10 minutes
    @			IN SOA	dns.od.com. dnsadmin.od.com. (
    				2018121601 ; serial
    				10800      ; refresh (3 hours)
    				900        ; retry (15 minutes)
    				604800     ; expire (1 week)
    				86400      ; minimum (1 day)
    				)
    				NS   dns.od.com.
    $ORIGIN od.com.
    $TTL 60	; 1 minute
    dns                             A    192.168.48.70

检查

![20210620200422135.png][]

systemctl restart bind

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 3][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 1]: /images/20221005/c181961e6e6a404ea15a185983c84951.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 2]: /images/20221005/53767a8a97e14a35a8d53cb406656a30.png
[20210620200422135.png]: /images/20221005/a697299d54ab43e0bfcadbc898b90a51.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NDk2ODc3_size_16_color_FFFFFF_t_70 3]: /images/20221005/37335f56d151461c9bf6ed412808af5c.png