一rpm包管理器
（一）rpm的介绍
rpm不仅是文件的后缀，也是一个工具，外部命令，程序包管理器
功能：将编译好的应用程序的各组成文件打包一个或几个程序包文件，从而方便快捷地实现程序包的安装、卸载、查询、升级和校验等管理操作。
[root@centos71 ~]# which rpm /usr/bin/rpm
（二）包文件组成 (每个包独有)
1RPM包内的文件
2RPM的元数据，如名称，版本，依赖性，描述等。打包但没有压缩。
3安装或卸载时运行的脚本。
rpm所谓的安装大部分是解压包，并且复制到设置好的路径。
要对复制的目录或者文件设置好相应的属性，比如文件的所有者和所属组。
如果系统没有这个账号那么就要编写脚本创建出来了。这是安装前的脚本。
系统中安装的软件是以rpm方式安装的。
安装好了之后那么Linux的数据库就会记录以rpm这种方式安装的所有包的信息。
可以查询在系统中安装了哪些rpm包，哪时候安装的，生成了哪些文件，在哪些目录里面。
从光盘里面拷贝一个文件
[root@centos71 ~]# cd /mnt/Packages/ [root@centos71 Packages]# cp tree-1.6.0-10.el7.x86_64.rpm /app/ [root@centos71 Packages]# cd /app/ [root@centos71 app]# ls tree-1.6.0-10.el7.x86_64.rpm
（三）数据库(公共)：/var/lib/rpm
程序包名称及版本
依赖关系
功能说明
包安装后生成的各文件路径及校验码信息
/var/lib/rpm/下面的文件是很重要的，为了安全可以做备份。
[root@centos71 app]# cd /var/lib/rpm/ [root@centos71 rpm]# ls Basenames Conflictname __db.001 __db.002 __db.003 Dirnames Group Installtid Name Obsoletename Packages Providename Requirename Sha1header Sigmd5 Triggername [root@centos71 rpm]# ll total 93708 -rw-r--r--. 1 root root 4247552 Jan 10 17:13 Basenames -rw-r--r--. 1 root root 16384 Jan 10 12:08 Conflictname -rw-r--r--. 1 root root 270336 Jan 10 17:13 __db.001 -rw-r--r--. 1 root root 81920 Jan 10 17:13 __db.002 -rw-r--r--. 1 root root 1318912 Jan 10 17:13 __db.003 -rw-r--r--. 1 root root 1146880 Jan 10 17:13 Dirnames -rw-r--r--. 1 root root 32768 Jan 10 17:13 Group -rw-r--r--. 1 root root 20480 Jan 10 17:13 Installtid -rw-r--r--. 1 root root 69632 Jan 10 17:13 Name -rw-r--r--. 1 root root 32768 Jan 10 12:08 Obsoletename -rw-r--r--. 1 root root 85598208 Jan 10 17:13 Packages -rw-r--r--. 1 root root 2486272 Jan 10 17:13 Providename -rw-r--r--. 1 root root 544768 Jan 10 17:13 Requirename -rw-r--r--. 1 root root 131072 Jan 10 17:13 Sha1header -rw-r--r--. 1 root root 73728 Jan 10 17:13 Sigmd5 -rw-r--r--. 1 root root 8192 Jan 10 12:05 Triggername
在6上查看
[root@centos65 ~]# ls /var/lib/rpm/ Basenames Dirnames Group Name Packages Provideversion Requirename Sha1header Triggername Conflictname Filedigests Installtid Obsoletename Providename Pubkeys Requireversion Sigmd5 [root@centos65 ~]# ls /var/lib/rpm/ -lh total 46M -rw-r--r--. 1 root root 2.7M Mar 3 17:51 Basenames -rw-r--r--. 1 root root 12K Jan 23 18:38 Conflictname -rw-r--r--. 1 root root 908K Mar 3 17:51 Dirnames -rw-r--r--. 1 root root 4.6M Mar 3 17:51 Filedigests -rw-r--r--. 1 root root 16K Mar 3 17:51 Group -rw-r--r--. 1 root root 16K Mar 3 17:51 Installtid -rw-r--r--. 1 root root 24K Mar 3 17:51 Name -rw-r--r--. 1 root root 12K Jan 23 18:45 Obsoletename -rw-r--r--. 1 root root 39M Mar 3 17:51 Packages -rw-r--r--. 1 root root 1.3M Mar 3 17:51 Providename -rw-r--r--. 1 root root 640K Mar 3 17:51 Provideversion -rw-r--r--. 1 root root 12K Jan 23 16:50 Pubkeys -rw-r--r--. 1 root root 212K Mar 3 17:51 Requirename -rw-r--r--. 1 root root 144K Mar 3 17:51 Requireversion -rw-r--r--. 1 root root 80K Mar 3 17:51 Sha1header -rw-r--r--. 1 root root 44K Mar 3 17:51 Sigmd5 -rw-r--r--. 1 root root 12K Jan 23 19:10 Triggername
（四）程序包的来源
(1) 系统发版的光盘或官方的服务器
CentOS镜像：
https://www.centos.org/download/
http://mirrors.aliyun.com
http://mirrors.sohu.com
http://mirrors.163.com
(2) 项目官方站点
(3) 第三方组织
Fedora-EPEL：Extra Packages for Enterprise Linux
都是经过红帽测试过的，可以放心使用。
https://mirrors.aliyun.com/epel/
[root@centos71 rpm]# cd [root@centos71 ~]# wget https://mirrors.aliyun.com/epel/7/x86_64/Packages/s/sl-5.02-1.el7.x86_64.rpm --2019-01-10 23:43:01-- https://mirrors.aliyun.com/epel/7/x86_64/Packages/s/sl-5.02-1.el7.x86_64.rpm Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 183.136.135.213, 183.136.135.223, 183.136.135.221, ... Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|183.136.135.213|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 14244 (14K) [application/x-redhat-package-manager] Saving to: ‘sl-5.02-1.el7.x86_64.rpm’ 100%[==================================================================================================================================================>] 14,244 --.-K/s in 0.05s 2019-01-10 23:43:07 (284 KB/s) - ‘sl-5.02-1.el7.x86_64.rpm’ saved [14244/14244] [root@centos71 ~]# ls anaconda-ks.cfg Desktop Documents Downloads initial-setup-ks.cfg Music oCam.exe Pictures Public sl-5.02-1.el7.x86_64.rpm Templates Videos [root@centos71 ~]# rpm -i sl-5.02-1.el7.x86_64.rpm warning: sl-5.02-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY [root@centos71 ~]# ls anaconda-ks.cfg Desktop Documents Downloads initial-setup-ks.cfg Music oCam.exe Pictures Public sl-5.02-1.el7.x86_64.rpm Templates Videos [root@centos71 ~]# sl
[root@centos65 ~]# wget https://mirrors.aliyun.com/epel/7/x86_64/Packages/s/sl-5.02-1.el7.x86_64.rpm --2019-03-14 19:43:13-- https://mirrors.aliyun.com/epel/7/x86_64/Packages/s/sl-5.02-1.el7.x86_64.rpm Resolving mirrors.aliyun.com... 119.96.206.233, 119.96.206.228, 119.96.206.230, ... Connecting to mirrors.aliyun.com|119.96.206.233|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 14244 (14K) [application/x-redhat-package-manager] Saving to: “sl-5.02-1.el7.x86_64.rpm” 100%[============================================================================================>] 14,244 --.-K/s in 0.07s 2019-03-14 19:43:19 (200 KB/s) - “sl-5.02-1.el7.x86_64.rpm” saved [14244/14244] [root@centos65 ~]# sl -bash: sl: command not found [root@centos65 ~]# ls 1Gb.file a anaconda-ks.cfg bin blkid f1 f2 f3 install.log install.log.syslog restore_iptables.sh sl-5.02-1.el7.x86_64.rpm [root@centos65 ~]# yum install sl Loaded plugins: fastestmirror, security Setting up Install Process Determining fastest mirrors ali-centos | 3.7 kB 00:00 base | 4.0 kB 00:00 ... epel | 4.7 kB 00:00 epel/primary_db | 6.0 MB 00:06 Resolving Dependencies --> Running transaction check ---> Package sl.x86_64 0:5.02-1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ====================================================================================================================================== Package Arch Version Repository Size ====================================================================================================================================== Installing: sl x86_64 5.02-1.el6 epel 13 k Transaction Summary ====================================================================================================================================== Install 1 Package(s) Total download size: 13 k Installed size: 15 k Is this ok [y/N]: y Downloading Packages: sl-5.02-1.el6.x86_64.rpm | 13 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : sl-5.02-1.el6.x86_64 1/1 Verifying : sl-5.02-1.el6.x86_64 1/1 Installed: sl.x86_64 0:5.02-1.el6 Complete!
输入sl就会出现下面的图片
Rpmforge:RHEL推荐，包很全
搜索引擎：
http://pkgs.org
http://rpmfind.net
http://rpm.pbone.net
https://sourceforge.net/
注意搜索出来的包可能会有问题。
(4) 自己制作。注意：第三方包建议要检查其合法性，来源合法性,程序包的完整性
二rpm包管理
CentOS系统上使用rpm命令管理程序包：安装、卸载、升级、查询、校验、数据库维护
（一）使用rpm命令安装包
rpm {-i|--install} [install-options] PACKAGE_FILE…
-v: verbose显示详细信息
-vv:显示更详细信息，可以在出现报错的时候进行排错的时候使用
-h: 以#显示程序包管理执行进度
rpm -ivh PACKAGE_FILE ..
注意安装包的时候要写明路径在哪
[root@centos71 app]# rpm -ivvh tree-1.6.0-10.el7.x86_64.rpm
D: ============== tree-1.6.0-10.el7.x86_64.rpm
D: loading keyring from pubkeys in /var/lib/rpm/pubkeys/*.key
D: couldn't find any keys in /var/lib/rpm/pubkeys/*.key
D: loading keyring from rpmdb
D: opening db environment /var/lib/rpm cdb:0x401
D: opening db index /var/lib/rpm/Packages 0x400 mode=0x0
D: locked db index /var/lib/rpm/Packages
D: opening db index /var/lib/rpm/Name 0x400 mode=0x0
D: Expected size: 47508 = lead(96)+sigs(1284)+pad(4)+data(46124)
D: Actual size: 47508
warning: tree-1.6.0-10.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: added binary package [0]
D: found 0 source and 1 binary packages
D: opening db index /var/lib/rpm/Conflictname 0x400 mode=0x0
D: ========== +++ tree-1.6.0-10.el7 x86_64/linux 0x2
D: opening db index /var/lib/rpm/Providename 0x400 mode=0x0
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6()(64bit) YES (db provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6(GLIBC_2.14)(64bit) YES (db provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6(GLIBC_2.2.5)(64bit) YES (db provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6(GLIBC_2.3)(64bit) YES (db provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6(GLIBC_2.3.4)(64bit) YES (db provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: libc.so.6(GLIBC_2.4)(64bit) YES (db provides)
D: Requires: rpmlib(CompressedFileNames) <= 3.0.4-1 YES (rpmlib provides)
D: Requires: rpmlib(FileDigests) <= 4.6.0-1 YES (rpmlib provides)
D: Requires: rpmlib(PayloadFilesHavePrefix) <= 4.0-1 YES (rpmlib provides)
D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: Requires: rtld(GNU_HASH) YES (db provides)
D: Requires: rpmlib(PayloadIsXz) <= 5.2-1 YES (rpmlib provides)
D: opening db index /var/lib/rpm/Obsoletename 0x400 mode=0x0
D: ========== recording tsort relations
D: ========== tsorting packages (order, #predecessors, #succesors, depth)
D: 0 0 0 1 +tree-1.6.0-10.el7.x86_64
D: installing binary packages
D: closed db index /var/lib/rpm/Obsoletename
D: closed db index /var/lib/rpm/Conflictname
D: closed db index /var/lib/rpm/Providename
D: closed db index /var/lib/rpm/Name
D: closed db index /var/lib/rpm/Packages
D: closed db environment /var/lib/rpm
D: opening db environment /var/lib/rpm cdb:0x401
D: opening db index /var/lib/rpm/Packages (none) mode=0x42
D: sanity checking 1 elements
D: opening db index /var/lib/rpm/Name (none) mode=0x42
D: read h# 1363 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: read h# 1363 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
D: computing 5 file fingerprints
D: opening db index /var/lib/rpm/Basenames (none) mode=0x42
D: opening db index /var/lib/rpm/Group (none) mode=0x42
D: opening db index /var/lib/rpm/Requirename (none) mode=0x42
D: opening db index /var/lib/rpm/Providename (none) mode=0x42
D: opening db index /var/lib/rpm/Conflictname (none) mode=0x42
D: opening db index /var/lib/rpm/Obsoletename (none) mode=0x42
D: opening db index /var/lib/rpm/Triggername (none) mode=0x42
D: opening db index /var/lib/rpm/Dirnames (none) mode=0x42
D: opening db index /var/lib/rpm/Installtid (none) mode=0x42
D: opening db index /var/lib/rpm/Sigmd5 (none) mode=0x42
D: opening db index /var/lib/rpm/Sha1header (none) mode=0x42
Preparing... D: computing file dispositions
D: 0x00000802 4096 12157150 26087632 /
################################# [100%]
package tree-1.6.0-10.el7.x86_64 is already installed
D: closed db index /var/lib/rpm/Sha1header
D: closed db index /var/lib/rpm/Sigmd5
D: closed db index /var/lib/rpm/Installtid
D: closed db index /var/lib/rpm/Dirnames
D: closed db index /var/lib/rpm/Triggername
D: closed db index /var/lib/rpm/Obsoletename
D: closed db index /var/lib/rpm/Conflictname
D: closed db index /var/lib/rpm/Providename
D: closed db index /var/lib/rpm/Requirename
D: closed db index /var/lib/rpm/Group
D: closed db index /var/lib/rpm/Basenames
D: closed db index /var/lib/rpm/Name
D: closed db index /var/lib/rpm/Packages
D: closed db environment /var/lib/rpm
（二）rpm包安装的相关设置
[install-options]
--test: 测试安装，但不真正执行安装，即dry run模式
--nodeps：忽略依赖关系
--replacepkgs | replacefiles
--nosignature: 不检查来源合法性
--nodigest：不检查包完整性
--noscripts：不执行程序包脚本
%pre: 安装前脚本； --nopre
%post: 安装后脚本； --nopost
%preun: 卸载前脚本； --nopreun
%postun: 卸载后脚本； --nopostun
卸载包
[root@centos71 app]# rpm -e sl [root@centos71 app]# [root@centos71 app]# cd [root@centos71 ~]# ls anaconda-ks.cfg Desktop Downloads Music Pictures skipfish-2.10-0.2.b.el7.x86_64.rpm Templates Documents initial-setup-ks.cfg oCam.exe Public sl-5.02-1.el7.x86_64.rpm Videos [root@centos71 ~]# ls anaconda-ks.cfg Desktop Documents Downloads initial-setup-ks.cfg Music oCam.exe Pictures Public
skipfish-2.10-0.2.b.el7.x86_64.rpm sl-5.02-1.el7.x86_64.rpm Templates Videos [root@centos71 ~]# mv sl-5.02-1.el7.x86_64.rpm /app/ [root@centos71 ~]# cd /app/ [root@centos71 app]# ls sl-5.02-1.el7.x86_64.rpm tree-1.6.0-10.el7.x86_64.rpm
--test: 测试安装，但不真正执行安装，即dry run模式
[root@centos71 app]# rpm -i sl-5.02-1.el7.x86_64.rpm --test warning: sl-5.02-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY [root@centos71 app]# rpm -ivh sl-5.02-1.el7.x86_64.rpm --test warning: sl-5.02-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY Preparing... ################################# [100%] [root@centos71 app]# rpm -ivvh sl-5.02-1.el7.x86_64.rpm --test D: ============== sl-5.02-1.el7.x86_64.rpm D: loading keyring from pubkeys in /var/lib/rpm/pubkeys/*.key D: couldn't find any keys in /var/lib/rpm/pubkeys/*.key D: loading keyring from rpmdb D: opening db environment /var/lib/rpm cdb:0x401 D: opening db index /var/lib/rpm/Packages 0x400 mode=0x0 D: locked db index /var/lib/rpm/Packages D: opening db index /var/lib/rpm/Name 0x400 mode=0x0 D: Expected size: 14244 = lead(96)+sigs(1284)+pad(4)+data(12860) D: Actual size: 14244 warning: sl-5.02-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY D: added binary package [0] D: found 0 source and 1 binary packages D: opening db index /var/lib/rpm/Conflictname 0x400 mode=0x0 D: ========== +++ sl-5.02-1.el7 x86_64/linux 0x2 D: opening db index /var/lib/rpm/Providename 0x400 mode=0x0 D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY D: Requires: libc.so.6()(64bit) YES (db provides) D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY D: Requires: libc.so.6(GLIBC_2.2.5)(64bit) YES (db provides) D: read h# 53 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY D: Requires: libncurses.so.5()(64bit) YES (db provides) D: read h# 53 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY D: Requires: libtinfo.so.5()(64bit) YES (db provides) D: Requires: rpmlib(CompressedFileNames) <= 3.0.4-1 YES (rpmlib provides) D: Requires: rpmlib(FileDigests) <= 4.6.0-1 YES (rpmlib provides) D: Requires: rpmlib(PayloadFilesHavePrefix) <= 4.0-1 YES (rpmlib provides) D: read h# 47 Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY D: Requires: rtld(GNU_HASH) YES (db provides) D: Requires: rpmlib(PayloadIsXz) <= 5.2-1 YES (rpmlib provides) D: opening db index /var/lib/rpm/Obsoletename 0x400 mode=0x0 D: ========== recording tsort relations D: ========== tsorting packages (order, #predecessors, #succesors, depth) D: 0 0 0 1 +sl-5.02-1.el7.x86_64 D: installing binary packages D: Selinux disabled. D: sanity checking 1 elements D: computing 7 file fingerprints D: opening db index /var/lib/rpm/Basenames 0x400 mode=0x0 D: opening db index /var/lib/rpm/Group 0x400 mode=0x0 D: opening db index /var/lib/rpm/Requirename 0x400 mode=0x0 D: opening db index /var/lib/rpm/Triggername 0x400 mode=0x0 D: opening db index /var/lib/rpm/Dirnames 0x400 mode=0x0 D: opening db index /var/lib/rpm/Installtid 0x400 mode=0x0 D: opening db index /var/lib/rpm/Sigmd5 0x400 mode=0x0 D: opening db index /var/lib/rpm/Sha1header 0x400 mode=0x0 Preparing... D: computing file dispositions D: 0x00000802 4096 12157164 26087641 / ################################# [100%] D: ========== +++ sl-5.02-1.el7 x86_64-linux 0x2 D: Expected size: 14244 = lead(96)+sigs(1284)+pad(4)+data(12860) D: Actual size: 14244 D: sl-5.02-1.el7.x86_64: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY D: closed db index /var/lib/rpm/Sha1header D: closed db index /var/lib/rpm/Sigmd5 D: closed db index /var/lib/rpm/Installtid D: closed db index /var/lib/rpm/Dirnames D: closed db index /var/lib/rpm/Triggername D: closed db index /var/lib/rpm/Obsoletename D: closed db index /var/lib/rpm/Conflictname D: closed db index /var/lib/rpm/Providename D: closed db index /var/lib/rpm/Requirename D: closed db index /var/lib/rpm/Group D: closed db index /var/lib/rpm/Basenames D: closed db index /var/lib/rpm/Name D: closed db index /var/lib/rpm/Packages D: closed db environment /var/lib/rpm
下面显示并没有真正的安装
[root@centos71 app]# sl -bash: /usr/bin/sl: No such file or directory
因为有依赖关系
包依赖关系就好比是楼与楼的关系。
假如A包依赖于B包，那么安装的时候就要先安装B包了。
但是在卸载的时候就要先卸载A包了。安装就相当于盖楼，B包是地基；卸载就相当于拆楼，A在楼上。
[root@centos71 app]# rpm -ivh /mnt/Packages/gcc-4.8.5-28.el7.x86_64.rpm
warning: /mnt/Packages/gcc-4.8.5-28.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
error: Failed dependencies:
cpp = 4.8.5-28.el7 is needed by gcc-4.8.5-28.el7.x86_64
glibc-devel >= 2.2.90-12 is needed by gcc-4.8.5-28.el7.x86_64
libmpc.so.3()(64bit) is needed by gcc-4.8.5-28.el7.x86_64
--replacepkgs
[root@centos71 app]# rpm -q tree tree-1.6.0-10.el7.x86_64 [root@centos71 app]# rpm -ql tree 安装包生成的文件。因为rpm包是打包文件，这些就相当于子文件。 /usr/bin/tree /usr/share/doc/tree-1.6.0 /usr/share/doc/tree-1.6.0/LICENSE /usr/share/doc/tree-1.6.0/README /usr/share/man/man1/tree.1.gz [root@centos71 app]# which tree 注意tree命令就是来自这个包的 /usr/bin/tree [root@centos71 app]# rm -f /usr/bin/tree
后面加上选项--replacepkgs
[root@centos71 app]# rpm -ivh tree-1.6.0-10.el7.x86_64.rpm
warning: tree-1.6.0-10.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing... ################################# [100%]
package tree-1.6.0-10.el7.x86_64 is already installed
[root@centos71 app]# #重新安装但是提示已经安装了。
[root@centos71 app]# rpm -ivh tree-1.6.0-10.el7.x86_64.rpm --replacepkgs
warning: tree-1.6.0-10.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:tree-1.6.0-10.el7 ################################# [100%]
[root@centos71 app]# tree
.
├── sl-5.02-1.el7.x86_64.rpm
└── tree-1.6.0-10.el7.x86_64.rpm
0 directories, 2 files
--replacepkgs的作用就是安装上包中所有的子包，已经有的文件就覆盖了。
[root@centos71 app]# ll /usr/share/doc/tree-1.6.0/README -rw-r--r--. 1 root root 4628 Jun 24 2011 /usr/share/doc/tree-1.6.0/README [root@centos71 app]# echo >> /usr/share/doc/tree-1.6.0/README [root@centos71 app]# ll /usr/share/doc/tree-1.6.0/README -rw-r--r--. 1 root root 4629 Jan 11 09:43 /usr/share/doc/tree-1.6.0/README [root@centos71 app]# rpm -ivh tree-1.6.0-10.el7.x86_64.rpm --replacepkgs warning: tree-1.6.0-10.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY Preparing... ################################# [100%] Updating / installing... 1:tree-1.6.0-10.el7 ################################# [100%] [root@centos71 app]# ll /usr/share/doc/tree-1.6.0/README -rw-r--r--. 1 root root 4628 Jun 24 2011 /usr/share/doc/tree-1.6.0/README
注意大部分程序是放在/usr/bin/或者/usr/sbin，并且不带版本号。
[root@centos71 app]# ls /usr/bin/* | wc
1695 1695 32695
[root@centos71 app]# ls /usr/sbin/* | wc
663 663 13361
[root@centos71 app]# ll /usr/bin/mpstat
-rwxr-xr-x. 1 root root 53728 Apr 11 2018 /usr/bin/mpstat
内核文件就带版本号。几个内核是可以并存的。启动的时候可以选择。
[root@centos71 app]# cd /boot/ [root@centos71 boot]# ls config-3.10.0-862.el7.x86_64 grub initramfs-0-rescue-685dc66dda59420c9a03dae9e6d67f2c.img
symvers-3.10.0-862.el7.x86_64.gz vmlinuz-0-rescue-685dc66dda59420c9a03dae9e6d67f2cefi
grub2 initramfs-3.10.0-862.el7.x86_64.img
System.map-3.10.0-862.el7.x86_64 vmlinuz-3.10.0-862.el7.x86_64
做rpm包的人已经指定好了文件安装的路径了。
目录满了就清理，报错就提示。
每个软件包都是按照文件的分层结构FHS来装入目录的。在Linux里面每个文件都是有规定的路径的。
（三）rpm包升级
升级：
rpm {-U|--upgrade} [install-options] PACKAGE_FILE ...
rpm {-F|--freshen} [install-options] PACKAGE_FILE ...
upgrade：安装有旧版程序包，则“升级”。如果不存在旧版程序包，则“安装”。
注意对应内核不要把进行升级，这样有风险的。内核占用的空间不大，所以可以在系统中设置双内核。
freshen：安装有旧版程序包，则“升级”。如果不存在旧版程序包，则不执行升级操作。
rpm -Uvh PACKAGE_FILE ...
rpm -Fvh PACKAGE_FILE ...
--oldpackage：降级
--force: 强制安装
卸载-e，后面加上包名就可以了。
为什么不写路径就可以卸载和查询，是从数据库里面查的。
安装的时候就要写上完整的文件路径了。
[root@centos71 ~]# rpm -e tree [root@centos71 ~]# rpm -q tree package tree is not installed