开放源代码的版本控制系统，相较于RCS、CVS，它采用了分支管理系统，它的设计目标就是取代CVS。互联网上很多版本控制服务已从CVS迁移到Subversion。说得简单一点SVN就是用于多个人共同开发同一个项目，共用资源的目的
Subversion将文件存放在中心版本库里，这个版本库很像一个普通的文件服务器，不同的是，它可以记录每一次文件和目录的修改情况，这样就可以借此将数据恢复到以前的版本，并可以查看数据的更改细节
- 优点：安全性高，速度快
Subversion支持Linux和Windows，更多是安装在Linux下。
svn服务器有2种运行方式：独立服务器和借助apache运行。两种方式各有利弊，用户可以自行选择。svn存储版本数据也有2种方式：BDB一种事务安全型表类型和FSFS一种不需要数据库的存储系统。
因为BDB方式在服务器中断时，有可能锁住数据，所以还是FSFS方式更安全一点。
安装配置SVN服务[root@localhost ~]# yum install subversion -y
[root@localhost ~]# rpm -qa subversion
subversion-1.10.2-2.module+el8.0.0+3900+919b6753.x86_64
#建立SVN版本库数据存储根目录（svndata）及用户，密码权限目录(svnpasswd）
[root@localhost ~]# mkdir -p /home/svndata
[root@localhost ~]# mkdir -p /home/svnpasswd
#启动SVN服务指定访问的SVN根目录
[root@localhost ~]# svnserve -d -r /home/svndata/
#查看进程和端口
[root@localhost ~]# ps -ef |grep svn
root 49980 1 0 00:19 ? 00:00:00 svnserve -d -r /home/svndata/
root 51912 16189 0 00:20 pts/3 00:00:00 grep --color=auto svn
[root@localhost ~]# lsof -i :3690
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
svnserve 49980 root 3u IPv4 307692 0t0 TCP *:svn (LISTEN)
[root@localhost ~]# netstat -lntup|grep svn
tcp 0 0 0.0.0.0:3690 0.0.0.0:* LISTEN 49980/svnserve
#建立项目版本库
[root@localhost ~]# svnadmin create /home/svndata/test
[root@localhost ~]# tree /home/svndata/test/
/home/svndata/test/
├── conf
│ ├── authz
│ ├── hooks-env.tmpl
│ ├── passwd
│ └── svnserve.conf
├── db
│ ├── current
│ ├── format
│ ├── fsfs.conf
│ ├── fs-type
│ ├── min-unpacked-rev
│ ├── revprops
│ │ └── 0
│ │ └── 0
│ ├── revs
│ │ └── 0
│ │ └── 0
│ ├── transactions
│ ├── txn-current
│ ├── txn-current-lock
│ ├── txn-protorevs
│ ├── uuid
│ └── write-lock
├── format
├── hooks
│ ├── post-commit.tmpl
│ ├── post-lock.tmpl
│ ├── post-revprop-change.tmpl
│ ├── post-unlock.tmpl
│ ├── pre-commit.tmpl
│ ├── pre-lock.tmpl
│ ├── pre-revprop-change.tmpl
│ ├── pre-unlock.tmpl
│ └── start-commit.tmpl
├── locks
│ ├── db.lock
│ └── db-logs.lock
└── README.txt
10 directories, 28 files
[root@localhost ~]# cd /root/svndata/test/conf/
-bash: cd: /root/svndata/test/conf/: 没有那个文件或目录
[root@localhost ~]# cd /home/svndata/test/
conf/ db/ hooks/ locks/
[root@localhost ~]# cd /home/svndata/test/conf/
[root@localhost conf]# ll
总用量 20
-rw-r--r--. 1 root root 1080 10月 12 00:22 authz
-rw-r--r--. 1 root root 885 10月 12 00:22 hooks-env.tmpl
-rw-r--r--. 1 root root 309 10月 12 00:22 passwd
-rw-r--r--. 1 root root 4375 10月 12 00:22 svnserve.conf
[root@localhost conf]# cp svnserve.conf svnserve.conf,ori
[root@localhost conf]# vim svnserve.conf
### users have read and write access to the repository.
anon-access = read #去掉#键
auth-access = write #去掉#键
### Uncomment the line below to use the default password file.
password-db = /home//svnpasswd/passwd #去掉#键，修改位置
### Uncomment the line below to use the default authorization file.
authz-db = /home/svnpasswd/authz #去掉#键，修改位置
#把密码文件模板拷贝到相关目录
[root@localhost conf]# cp passwd authz /home/svnpasswd/
[root@localhost conf]# ll /home/svnpasswd/
总用量 8
-rw-r--r--. 1 root root 1080 10月 12 00:28 authz
-rw-r--r--. 1 root root 309 10月 12 00:28 passwd
#因为SVN默认都是明文密码，为了安全起见加上权限
[root@localhost conf]# cd /home/svnpasswd/
[root@localhost svnpasswd]# chmod 700 *
[root@localhost svnpasswd]# ll
总用量 8
-rwx------. 1 root root 1080 10月 12 00:28 authz
-rwx------. 1 root root 309 10月 12 00:28 passwd
#创建SVN用户及设置权限
[root@localhost svnpasswd]# cat passwd
### This file is an example password file for svnserve.
### Its format is similar to that of svnserve.conf. As shown in the
### example below it contains one section labelled [users].
### The name and password for each user follow, one account per line.
[users]
# harry = harryssecret
# sally = sallyssecret
cyh = 123456
test = 123..
itcast = 123456
[root@localhost svnpasswd]# cat authz
### This file is an example authorization file for svnserve.
### Its format is identical to that of mod_authz_svn authorization
### files.
### As shown below each section defines authorizations for the path and
### (optional) repository specified by the section name.
### The authorizations follow. An authorization line can refer to:
### - a single user,
### - a group of users defined in a special [groups] section,
### - an alias defined in a special [aliases] section,
### - all authenticated users, using the '$authenticated' token,
### - only anonymous users, using the '$anonymous' token,
### - anyone, using the '*' wildcard.
###
### A match can be inverted by prefixing the rule with '~'. Rules can
### grant read ('r') access, read-write ('rw') access, or no access
### ('').
[aliases]
# joe = /C=XZ/ST=Dessert/L=Snake City/O=Snake Oil, Ltd./OU=Research Institute/CN=Joe Average
[groups]
# harry_and_sally = harry,sally
# harry_sally_and_joe = harry,sally,&joe
# [/foo/bar]
# harry = rw
# &joe = r
# * =
# [repository:/baz/fuz]
# @harry_and_sally = rw
# * = r
[test:/]
cyh = rw
itcast = rw
test = rw
[root@localhost svnpasswd]# svnserve -d -r /home/svndata/
