Linux安装后基础配置--网络--ssh--基本软件

安装教程比较多就不写了。

网络配置

设置虚拟网络

修改网络配置文件

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

将ONBOOT由no改为yes：

修改为静态网络

/etc/sysconfig/network-scripts/ifcfg-eth33

BOOTPROTO=static
IPADDR=192.168.1.129
GATEWAY=192.168.1.2
DNS1=8.8.8.8
DNS2=114.114.114.114

添加dns服务器

在此要强调一点的是，直接修改/etc/resolv.conf这个文件是没用的，网络服务重启以后会根据/etc/sysconfig /network-scripts/ifcfg-eth33来重载配置
我们上面加了就不用改了

vi /etc/resolv.conf

添加首选DNS服务器和备选DNS服务器。

nameserver 8.8.8.8
nameserver 114.114.114.114

重启网络服务

service network restart

关闭防火墙

虚拟机放心关掉

#暂时关闭防火墙
systemctl stop firewalld
#永久关闭防火墙
systemctl disable firewalld

配置镜像源

备份yum源(可选)

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

修改

中科大

sed -e 's|^mirrorlist=|#mirrorlist=|g' \-e 's|^#baseurl=http://mirror.centos.org/centos|baseurl=https://mirrors.ustc.edu.cn/centos|g' \-i.bak \/etc/yum.repos.d/CentOS-Base.repo

阿里云

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

清理缓存

yum makecache 

软件安装

Vim

yum -y install vim

wget

yum -y install wget

安装net-tools

	yum search net-tools#先查找在安装yum install  -y net-tools.x86_64

更新系统

  yum update -y

ssh

烦死了，改了一个上午，好多教程都没啥用。

可能出现的问题

1. channel is not opened.
2. 连接半天，密码没错但是出现要输入密码

解决

首先看ssh是否安装，这个一般都还是有的。

yum list installed | ssh

主要看配置.

PermitRootLogin改为yes
PasswordAuthentication改为yes
UseDNS改为 no
UsePAM 改为yes

重启ssh

systemctl restart sshd.service

配置文件

/etc/ssh/sshd_config

     1  #       $OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy Exp $2  3  # This is the sshd server system-wide configuration file.  See4  # sshd_config(5) for more information.5  6  # This sshd was compiled with PATH=/usr/local/bin:/usr/bin7  8  # The strategy used for options in the default sshd_config shipped with9  # OpenSSH is to specify options with their default value where10  # possible, but leave them commented.  Uncommented options override the11  # default value.12  13  # If you want to change the port on a SELinux system, you have to tell14  # SELinux about this change.15  # semanage port -a -t ssh_port_t -p tcp #PORTNUMBER16  #17  #Port 2218  #AddressFamily any19  #ListenAddress 0.0.0.020  #ListenAddress ::21  22  HostKey /etc/ssh/ssh_host_rsa_key23  #HostKey /etc/ssh/ssh_host_dsa_key24  HostKey /etc/ssh/ssh_host_ecdsa_key25  HostKey /etc/ssh/ssh_host_ed25519_key26  27  # Ciphers and keying28  #RekeyLimit default none29  30  # Logging31  #SyslogFacility AUTH32  SyslogFacility AUTHPRIV33  #LogLevel INFO34  35  # Authentication:36  37  #LoginGraceTime 2m38  PermitRootLogin yes39  #StrictModes yes40  #MaxAuthTries 641  #MaxSessions 2042  43  #PubkeyAuthentication yes44  45  # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys246  # but this is overridden so installations will only check .ssh/authorized_keys47  AuthorizedKeysFile      .ssh/authorized_keys48  49  #AuthorizedPrincipalsFile none50  51  #AuthorizedKeysCommand none52  #AuthorizedKeysCommandUser nobody53  54  # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts55  #HostbasedAuthentication no56  # Change to yes if you don't trust ~/.ssh/known_hosts for57  # HostbasedAuthentication58  #IgnoreUserKnownHosts no59  # Don't read the user's ~/.rhosts and ~/.shosts files60  #IgnoreRhosts yes61  62  # To disable tunneled clear text passwords, change to no here!63  #PasswordAuthentication yes64  #PermitEmptyPasswords no65  PasswordAuthentication yes66  67  # Change to no to disable s/key passwords68  #ChallengeResponseAuthentication yes69  ChallengeResponseAuthentication no70  71  # Kerberos options72  #KerberosAuthentication no73  #KerberosOrLocalPasswd yes74  #KerberosTicketCleanup yes75  #KerberosGetAFSToken no76  #KerberosUseKuserok yes77  78  # GSSAPI options79  GSSAPIAuthentication yes80  GSSAPICleanupCredentials no81  #GSSAPIStrictAcceptorCheck yes82  #GSSAPIKeyExchange no83  #GSSAPIEnablek5users no84  85  # Set this to 'yes' to enable PAM authentication, account processing,86  # and session processing. If this is enabled, PAM authentication will87  # be allowed through the ChallengeResponseAuthentication and88  # PasswordAuthentication.  Depending on your PAM configuration,89  # PAM authentication via ChallengeResponseAuthentication may bypass90  # the setting of "PermitRootLogin without-password".91  # If you just want the PAM account and session checks to run without92  # PAM authentication, then enable this but set PasswordAuthentication93  # and ChallengeResponseAuthentication to 'no'.94  # WARNING: 'UsePAM no' is not supported in Red Hat Enterprise Linux and may cause several95  # problems.96  UsePAM yes97  98  #AllowAgentForwarding yes99  #AllowTcpForwarding yes100  #GatewayPorts no101  X11Forwarding yes102  #X11DisplayOffset 10103  #X11UseLocalhost yes104  #PermitTTY yes105  #PrintMotd yes106  #PrintLastLog yes107  #TCPKeepAlive yes108  #UseLogin no109  #UsePrivilegeSeparation sandbox110  #PermitUserEnvironment no111  #Compression delayed112  #ClientAliveInterval 0113  #ClientAliveCountMax 3114  #ShowPatchLevel no115  UseDNS no116  #PidFile /var/run/sshd.pid117  #MaxStartups 10:30:100118  #PermitTunnel no119  #ChrootDirectory none120  #VersionAddendum none121  122  # no default banner path123  #Banner none124  125  # Accept locale-related environment variables126  AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES127  AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT128  AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE129  AcceptEnv XMODIFIERS130  131  # override default of no subsystems132  Subsystem       sftp    /usr/libexec/openssh/sftp-server133  134  # Example of overriding settings on a per-user basis135  #Match User anoncvs136  #       X11Forwarding no137  #       AllowTcpForwarding no138  #       PermitTTY no139  #       ForceCommand cvs server