TeamCity CI/CD 01

# 环境
  CentOS7
  
# 国内可用yum 源 
- http://mirrors.aliyun.com/repo/Centos-7.repo
- http://mirrors.163.com/.help/CentOS7-Base-163.repo

- [网易Centos源配置教程][163]

[163]: http://mirrors.163.com/.help/centos.html "网易Centos源配置教程"

- [清华大学源配置教程][cnnic]
[cnnic]: https://mirrors.cnnic.cn/help/centos/ "清华大学源配置教程"





# 更改系统yum为国内源
- 进入 `/etc/yum.repos.d` 目录使用 `mv` 备份当前yum配置

![](https://www.hcc11.cn/static/img/2020/05/2786899036.png)

- 使用 `curl` 下载repo文件，以下地址用阿里云yum源
`curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo `

![](https://www.hcc11.cn/static/img/2020/05/3477215769.png)

- 使用 `yum clean all ` 清空本次缓存，使用 `yum makecache ` 生成新的缓存。

```
[root@localhost yum.repos.d]# yum clean all 
已加载插件：fastestmirror
正在清理软件源： base extras updates
Cleaning up everything
Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos
Cleaning up list of fastest mirrors
[root@localhost yum.repos.d]# yum makecache
已加载插件：fastestmirror
base                                                            | 3.6 kB  00:00:00     
extras                                                          | 2.9 kB  00:00:00     
updates                                                         | 2.9 kB  00:00:00     
(1/10): base/7/x86_64/group_gz                                  | 153 kB  00:00:00     
(2/10): base/7/x86_64/filelists_db                              | 7.1 MB  00:00:03     
(3/10): base/7/x86_64/other_db                                  | 2.6 MB  00:00:01     
(4/10): extras/7/x86_64/filelists_db                            | 205 kB  00:00:02     
(5/10): extras/7/x86_64/primary_db                              | 194 kB  00:00:02     
(6/10): extras/7/x86_64/other_db                                | 122 kB  00:00:00     
(7/10): updates/7/x86_64/primary_db                             | 1.3 MB  00:00:00     
(8/10): updates/7/x86_64/filelists_db                           | 980 kB  00:00:00     
(9/10): updates/7/x86_64/other_db                               | 183 kB  00:00:00     
(10/10): base/7/x86_64/primary_db                               | 6.1 MB  00:00:10     
Determining fastest mirrors
元数据缓存已建立

```


# yum相关操作
- `search` 搜索yum源中相关yum软件包

```

[root@localhost yum.repos.d]# yum search vim
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
================================== N/S matched: vim ===================================
protobuf-vim.x86_64 : Vim syntax highlighting for Google Protocol Buffers descriptions
vim-X11.x86_64 : The VIM version of the vi editor for the X Window System
vim-common.x86_64 : The common files needed by any version of the VIM editor
vim-enhanced.x86_64 : A version of the VIM editor which includes recent enhancements
vim-filesystem.x86_64 : VIM filesystem layout
vim-minimal.x86_64 : A minimal version of the VIM editor

  名称和简介匹配 only，使用“search all”试试。
  
```

- `install` 安装yum软件包

```
[root@localhost yum.repos.d]# yum vim-common.x86_64
已加载插件：fastestmirror
没有该命令：vim-common.x86_64。请使用 /usr/bin/yum --help
[root@localhost yum.repos.d]# yum install vim-common.x86_64
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
正在解决依赖关系
--> 正在检查事务
---> 软件包 vim-common.x86_64.2.7.4.629-6.el7 将被 安装
--> 正在处理依赖关系 vim-filesystem，它被软件包 2:vim-common-7.4.629-6.el7.x86_64 需要
--> 正在检查事务
---> 软件包 vim-filesystem.x86_64.2.7.4.629-6.el7 将被 安装
--> 解决依赖关系完成

依赖关系解决

=======================================================================================
 Package                 架构            版本                      源             大小
=======================================================================================
正在安装:
 vim-common              x86_64          2:7.4.629-6.el7           base          5.9 M
为依赖而安装:
 vim-filesystem          x86_64          2:7.4.629-6.el7           base           11 k

事务概要
=======================================================================================
安装  1 软件包 (+1 依赖软件包)

总下载量：5.9 M
安装大小：21 M
Is this ok [y/d/N]: y
Downloading packages:
警告：/var/cache/yum/x86_64/7/base/packages/vim-filesystem-7.4.629-6.el7.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID f4a80eb5: NOKEY
vim-filesystem-7.4.629-6.el7.x86_64.rpm 的公钥尚未安装
(1/2): vim-filesystem-7.4.629-6.el7.x86_64.rpm                  |  11 kB  00:00:00     
(2/2): vim-common-7.4.629-6.el7.x86_64.rpm                      | 5.9 MB  00:00:02     
---------------------------------------------------------------------------------------
总计                                                      2.5 MB/s | 5.9 MB  00:02     
从 http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 检索密钥
导入 GPG key 0xF4A80EB5:
 用户ID     : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
 指纹       : 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
 来自       : http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
是否继续？[y/N]：y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : 2:vim-filesystem-7.4.629-6.el7.x86_64                              1/2 
  正在安装    : 2:vim-common-7.4.629-6.el7.x86_64                                  2/2 
  验证中      : 2:vim-common-7.4.629-6.el7.x86_64                                  1/2 
  验证中      : 2:vim-filesystem-7.4.629-6.el7.x86_64                              2/2 

已安装:
  vim-common.x86_64 2:7.4.629-6.el7                                                    

作为依赖被安装:
  vim-filesystem.x86_64 2:7.4.629-6.el7                                                

完毕！

```

- `remove` 删除软件包

```
[root@localhost yum.repos.d]# yum remove vim-common.x86_64
已加载插件：fastestmirror
正在解决依赖关系
--> 正在检查事务
---> 软件包 vim-common.x86_64.2.7.4.629-6.el7 将被 删除
--> 解决依赖关系完成

依赖关系解决

=======================================================================================
 Package              架构             版本                      源               大小
=======================================================================================
正在删除:
 vim-common           x86_64           2:7.4.629-6.el7           @base            21 M

事务概要
=======================================================================================
移除  1 软件包

安装大小：21 M
是否继续？[y/N]：y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在删除    : 2:vim-common-7.4.629-6.el7.x86_64                                  1/1 
  验证中      : 2:vim-common-7.4.629-6.el7.x86_64                                  1/1 

删除:
  vim-common.x86_64 2:7.4.629-6.el7                                                    

完毕！

```

- `list` 列出已安装或可安装的yum软件包

```xml
[root@localhost yum.repos.d]# yum list vim*
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
已安装的软件包
vim-filesystem.x86_64                     2:7.4.629-6.el7                     @base    
vim-minimal.x86_64                        2:7.4.160-2.el7                     @anaconda
可安装的软件包
vim-X11.x86_64                            2:7.4.629-6.el7                     base     
vim-common.x86_64                         2:7.4.629-6.el7                     base     
vim-enhanced.x86_64                       2:7.4.629-6.el7                     base     
vim-minimal.x86_64                        2:7.4.629-6.el7                     base     
[root@localhost yum.repos.d]# 

```

- `-h` 帮助列表

```
[root@localhost yum.repos.d]# yum -h
已加载插件：fastestmirror
Usage: yum [options] COMMAND

List of Commands:

check          检查 RPM 数据库问题
check-update   检查是否有可用的软件包更新
clean          删除缓存数据
deplist        列出软件包的依赖关系
distribution-synchronization 已同步软件包到最新可用版本
downgrade      降级软件包
erase          从系统中移除一个或多个软件包
fs             Acts on the filesystem data of the host, mainly for removing docs/lanuages for minimal hosts.
fssnapshot     Creates filesystem snapshots, or lists/deletes current snapshots.
groups         显示或使用、组信息
help           显示用法提示
history        显示或使用事务历史
info           显示关于软件包或组的详细信息
install        向系统中安装一个或多个软件包
list           列出一个或一组软件包
load-transaction 从文件名中加载一个已存事务
makecache      创建元数据缓存
provides       查找提供指定内容的软件包
reinstall      覆盖安装软件包
repo-pkgs      将一个源当作一个软件包组，这样我们就可以一次性安装/移除全部软件包。
repolist       显示已配置的源
search         在软件包详细信息中搜索指定字符串
shell          运行交互式的 yum shell
swap           Simple way to swap packages, instead of using shell
update         更新系统中的一个或多个软件包
update-minimal Works like upgrade, but goes to the 'newest' package match which fixes a problem that affects your system
updateinfo     Acts on repository update information
upgrade        更新软件包同时考虑软件包取代关系
version        显示机器和/或可用的源版本。
...

```

# 注意
- 切换成功后记得使用 ` yum install yum-plugin-fastestmirror  ` 安装这个插件，要不然搜索不到软件

# 参考
- https://www.cnblogs.com/bg7c/p/9293133.html
- https://man.linuxde.net/yum

切换linux中yum源到国内和相关yum常用基本操作

#现象
- 虚拟机网络模式为NAT模式
- 系统无法ping通外网
![](https://www.hcc11.cn/static/img/2020/05/1760290233.png)





# 解决方法
- 进入/etc/sysconfig/network-scripts目录，输入列表目录找到ifcfg-ens33
`cd /etc/sysconfig/network-scripts/`
`ls `
![](https://www.hcc11.cn/static/img/2020/05/3524947543.png)
![](https://www.hcc11.cn/static/img/2020/05/953339497.png)

- 使用vi编辑文件,找到【ONBOOT=no】改为【NOBOOTS=yes】,然后保存文件，这样重启后就可以启动网络了。
`vi ifcfg-ens33`

![](https://www.hcc11.cn/static/img/2020/05/1444272775.png)

- 重启网络服务。
` service network restart `

![](https://www.hcc11.cn/static/img/2020/05/2440371357.png)

- 再次ping外网，成功
![](https://www.hcc11.cn/static/img/2020/05/3897064922.png)

- 重启系统查看是否可以ping通
`reboot`

# 参考
- https://blog.csdn.net/qq_24342335/article/details/81449270

Vm15虚拟机按照Centos7无法上网

# 系统环境
- CentOS 7

# 端口查询
- 端口查询 netstat  -anp  | grep 端口号


	[root@xxxxx ~]# netstat  -anp  | grep 80
    tcp     0      0 0.0.0.0:80              0.0.0.0:*               LISTEN     14681/jwss
    tcp     0      0 127.0.0.1:51954      127.0.0.1:80        ESTABLISHED 13480/AliYunDun
# 防火墙状态
- 查看firewall服务状态 systemctl status firewalld

- 开启防火墙 systemctl start firewalld

- 重启防火墙 systemctl restart firewalld

- 关闭防火墙 systemctl stop firewalld




- 查看防火墙规则 firewall-cmd --list-all

- 查询端口是否开放 firewall-cmd --query-port=8080/tcp

- 开放80端口 firewall-cmd --permanent --add-port=80/tcp

- 移除端口 firewall-cmd --permanent --remove-port=8080/tcp

- 重启防火墙(修改配置后要重启防火墙) firewall-cmd --reload


```

    [root@iZaaisf2ubkmstZ ~]# systemctl status firewalld  //查看状态
        ● firewalld.service - firewalld - dynamic firewall daemon
           Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
           Active: inactive (dead) since Tue 2019-06-11 23:05:06 CST; 2 months 6 days ago
             Docs: man:firewalld(1)
         Main PID: 486 (code=exited, status=0/SUCCESS)
    	 
    [root@iZaaisf2ubkmstZ ~]# systemctl start firewalld  //开启
    
    [root@iZaaisf2ubkmstZ ~]# systemctl status firewalld    //查看状态 为激活
    ● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: active (running) since Sun 2019-08-18 14:23:17 CST; 16min ago
         Docs: man:firewalld(1)
     Main PID: 31938 (firewalld)
        Tasks: 2
       Memory: 26.4M
       CGroup: /system.slice/firewalld.service
               └─31938 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
    
    Aug 18 14:23:16 iZaaisf2ubkmstZ systemd[1]: Starting firewalld - dynamic firewall daemon...
    Aug 18 14:23:17 iZaaisf2ubkmstZ systemd[1]: Started firewalld - dynamic firewall daemon.
    
    [root@iZaaisf2ubkmstZ ~]# systemctl stop firewalld   //停止
    
    [root@iZaaisf2ubkmstZ ~]# systemctl status firewalld  //查看状态已停止
    ● firewalld.service - firewalld - dynamic firewall daemon
       Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
       Active: inactive (dead) since Sun 2019-08-18 14:41:26 CST; 2s ago
         Docs: man:firewalld(1)
      Process: 31938 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
     Main PID: 31938 (code=exited, status=0/SUCCESS)
     
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --list-all    //端口列表 可见到有20，21，22，80，39000-4000
    public
      target: default
      icmp-block-inversion: no
      interfaces: 
      sources: 
      services: ssh dhcpv6-client
      ports: 20/tcp 21/tcp 22/tcp 80/tcp 8888/tcp 39000-40000/tcp
      protocols: 
      masquerade: no
      forward-ports: 
      source-ports: 
      icmp-blocks: 
      rich rules: 
      
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --query-port=8080/tcp  //查询8080 不在
    no
    
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --query-port=80/tcp //查询80 在
    yes
    
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --permanent --add-port=88/tcp  //添加88端口
    success
    
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --permanent --remove-port=80/tcp //移除80端口
    success
    
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --list-all  //查看 可发现刚才添加的88和移除的80没有生效
    public
      target: default
      icmp-block-inversion: no
      interfaces: 
      sources: 
      services: ssh dhcpv6-client
      ports: 20/tcp 21/tcp 22/tcp 80/tcp 8888/tcp 39000-40000/tcp
      protocols: 
      masquerade: no
      forward-ports: 
      source-ports: 
      icmp-blocks: 
      rich rules: 
    	
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --reload //使用此命令使刚才命令生效
    success
    
    [root@iZaaisf2ubkmstZ ~]# firewall-cmd --list-all //查看 已生效
    public
      target: default
      icmp-block-inversion: no
      interfaces: 
      sources: 
      services: ssh dhcpv6-client
      ports: 20/tcp 21/tcp 22/tcp 8888/tcp 39000-40000/tcp 88/tcp
      protocols: 
      masquerade: no
      forward-ports: 
      source-ports: 
      icmp-blocks: 
      rich rules: 
    	 
    

```
    

# PS命令

- 查询进程详情 ps -aux | grep 进程名

```

    [root@iZaaisf2ubkmstZ ~]# ps -aux | grep redis
    root      1061  0.0  0.0 141848   588 ?        Ssl  May29 110:29 /usr/redis/parse/redis-server 0.0.0.0:10066
    root      1610  0.0  0.0 112708   984 pts/0    R+   14:53   0:00 grep --color=auto redis

```

# 磁盘

-  df命令用于显示目前在Linux系统上的文件系统的磁盘使用情况统计 df -h
-  磁盘信息 fdisk -l


    [root@iZaaisf2ubkmstZ ~]# df -h   //文件系统使用信息
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/vda1        40G   13G   25G  34% /
    devtmpfs        486M     0  486M   0% /dev
    tmpfs           497M   24K  497M   1% /dev/shm
    tmpfs           497M  416K  496M   1% /run
    tmpfs           497M     0  497M   0% /sys/fs/cgroup
    tmpfs           100M     0  100M   0% /run/user/0
	[root@iZaaisf2ubkmstZ ~]# fdisk -l  //当前磁盘信息
	Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors
	Units = sectors of 1 * 512 = 512 bytes
	Sector size (logical/physical): 512 bytes / 512 bytes
	I/O size (minimum/optimal): 512 bytes / 512 bytes
	Disk label type: dos
	Disk identifier: 0x0008d73a
	
	Device Boot      Start         End      Blocks   Id  System
	/dev/vda1   *        2048    83884031    41940992   83  Linux

    

# Kill命令
- 强制结束进程 kill -9 进程号


    [root@iZaaisf2ubkmstZ ~]# ps -aux | grep redis //查看redis进程
    root      1061  0.0  0.0 141848   588 ?        Ssl  May29 110:30 /usr/redis/parse/redis-server 0.0.0.0:10066
    root      2038  0.0  0.0 112712   980 pts/0    S+   15:01   0:00 grep --color=auto redis
    [root@iZaaisf2ubkmstZ ~]# kill -9 1061 //杀死进程
    [root@iZaaisf2ubkmstZ ~]# ps -aux | grep redis //在使用命令查看
    root      2068  0.0  0.0 112708   984 pts/0    S+   15:01   0:00 grep --color=auto redis
    

# rm 删除命令
- `rm -rf dirname ` 删除文件夹
- `rm -rf file-* ` 删除所有以`file- `开头的文件

# rpm 软件包的管理工具
- ` rpm -qa | grep sql ` 查找所有安装过的包含某个字符串sql的软件包
- `rpm -ql redis `  rpm包中的文件安装位置

# SS 查询活动网络Socket
- ` ss -nlp | grep redis ` 查找redis监听的端口信息

# 参考
- Linux命令大全 https://man.linuxde.net/