[root@localhost ~]# yum -y install fonts-chinese

Loading "rhnplugin" plugin Loading "security" plugin This system is not registered with RHN. RHN support will be disabled. Setting up Install Process Parsing package install arguments No package fonts-chinese available. Nothing to do [root@localhost ~]# yum update Loading "rhnplugin" plugin Loading "security" plugin This system is not registered with RHN. RHN support will be disabled. Skipping security plugin, no data Setting up Update Process Skipping security plugin, no data Skipping security plugin, no data No Packages marked for Update [root@localhost ~]# yum install Loading "rhnplugin" plugin Loading "security" plugin This system is not registered with RHN. RHN support will be disabled. Error: Need to pass a list of pkgs to install usage: yum [options] < grouplist, localinstall, groupinfo, localupdate, resolvedep, erase, deplist, groupremove, makecache, upgrade, list-security, provides, shell, install, whatprovides, groupinstall, update, repolist, groupupdate, info, search, check-update, list-sec, list, remove, info-sec, clean, info-security, grouperase >

options:

-h, --help show this help message and exit -t, --tolerant be tolerant of errors -C run entirely from cache, don't update cache -c [config file] config file location -R [minutes] maximum command wait time -d [debug level] debugging output level -e [error level] error output level -q, --quiet quiet operation -v, --verbose verbose operation -y answer yes for all questions --version show Yum version and exit --installroot=[path] set install root --enablerepo=[repo] enable one or more repositories (wildcards allowed) --disablerepo=[repo] disable one or more repositories (wildcards allowed) -x [package], --exclude=[package] exclude package(s) by name or glob --disableexcludes=[repo] disable exclude from main, for a repo or for everything --obsoletes enable obsoletes processing during updates --noplugins disable Yum plugins --nogpgcheck disable gpg signature checking --disableplugin=[plugin] disable plugins by name --security Include security relevant packages --cve=CVE Include packages needed to fix the given CVE --bz=BZ Include packages needed to fix the given BZ --advisory=ADVISORY Include packages needed to fix the given advisory [root@localhost ~]# yum -versioin Loading "rhnplugin" plugin Loading "security" plugin usage: yum [options] < grouplist, localinstall, groupinfo, localupdate, resolvedep, erase, deplist, groupremove, makecache, upgrade, provides, shell, install, whatprovides, groupinstall, update, repolist, groupupdate, info, search, check-update, list, remove, clean, grouperase >

Command line error: option -e: invalid integer value: 'rsioin'

[root@localhost ~]# yum -version Loading "rhnplugin" plugin Loading "security" plugin usage: yum [options] < grouplist, localinstall, groupinfo, localupdate, resolvedep, erase, deplist, groupremove, makecache, upgrade, provides, shell, install, whatprovides, groupinstall, update, repolist, groupupdate, info, search, check-update, list, remove, clean, grouperase >

Command line error: option -e: invalid integer value: 'rsion'

[root@localhost ~]# yum install yum-fastestmirror Loading "rhnplugin" plugin Loading "security" plugin This system is not registered with RHN. RHN support will be disabled. Setting up Install Process Parsing package install arguments No package yum-fastestmirror available. Nothing to do [root@localhost ~]# yum install httpd Loading "rhnplugin" plugin Loading "security" plugin This system is not registered with RHN. RHN support will be disabled. Setting up Install Process Parsing package install arguments No package httpd available. Nothing to do [root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps [root@localhost ~]# rpm -qa |grep yum [root@localhost ~]# wget --02:30:56-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 404 Not Found 02:30:56 ERROR 404: Not Found.

[root@localhost ~]# wget

--02:33:37-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 26027 (25K) [application/x-redhat-package-manager] Saving to: `yum-metadata-parser-1.1.2-4.el5.x86_64.rpm'

100%[=======================================>] 26,027 --.-K/s in 0.06s

02:33:37 (406 KB/s) - `yum-metadata-parser-1.1.2-4.el5.x86_64.rpm' saved [26027/26027]

[root@localhost ~]# wget

--02:34:30-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 21033 (21K) [application/x-redhat-package-manager] Saving to: `yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm'

100%[=======================================>] 21,033 --.-K/s in 0.06s

02:34:30 (332 KB/s) - `yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm' saved [21033/21033]

[root@localhost ~]# wget

--02:34:57-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1034960 (1011K) [application/x-redhat-package-manager] Saving to: `yum-3.2.22-40.el5.centos.noarch.rpm'

100%[=======================================>] 1,034,960 848K/s in 1.2s

02:34:58 (848 KB/s) - `yum-3.2.22-40.el5.centos.noarch.rpm' saved [1034960/1034960]

[root@localhost ~]# rpm -ivh yum-

warning: yum-3.2.22-40.el5.centos.noarch.rpm: Header V3 DSA signature: NOKEY, key ID e8562897

error: Failed dependencies:

libc.so.6()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libc.so.6(GLIBC_2.2.5)(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libglib-2.0.so.0()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libm.so.6()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libpthread.so.0()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libsqlite3.so.0()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libxml2.so.2()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

libz.so.1()(64bit) is needed by yum-metadata-parser-1.1.2-4.el5.x86_64

[root@localhost ~]# file /bin/ls

/bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped

[root@localhost ~]# rpm -qa|grep yum

[root@localhost ~]# ls

anaconda-ks.cfg yum-3.2.22-40.el5.centos.noarch.rpm

Desktop yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm

install.log yum-metadata-parser-1.1.2-4.el5.x86_64.rpm

install.log.syslog

[root@localhost ~]# rim yum-.rpm bash: rim: command not found [root@localhost ~]# rm yum-*.rpm rm: remove regular file yum-3.2.22-40.el5.centos.noarch.rpm'? y <br/>rm: remove regular fileyum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm'? y rm: remove regular file yum-metadata-parser-1.1.2-4.el5.x86_64.rpm'? y <br/>[root@localhost ~]# ls <br/>anaconda-ks.cfg Desktop install.log install.log.syslog <br/>[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm <br/>--02:38:42-- http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm <br/>Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 <br/>Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. <br/>HTTP request sent, awaiting response... 200 OK <br/>Length: 1034960 (1011K) [application/x-redhat-package-manager] <br/>Saving to:yum-3.2.22-40.el5.centos.noarch.rpm'

100%[=======================================>] 1,034,960 1.07M/s in 0.9s

02:38:43 (1.07 MB/s) - `yum-3.2.22-40.el5.centos.noarch.rpm' saved [1034960/1034960]

[root@localhost ~]# wget

--02:38:59-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 26164 (26K) [application/x-redhat-package-manager] Saving to: `yum-metadata-parser-1.1.2-4.el5.i386.rpm'

100%[=======================================>] 26,164 --.-K/s in 0.06s

02:38:59 (453 KB/s) - `yum-metadata-parser-1.1.2-4.el5.i386.rpm' saved [26164/26164]

[root@localhost ~]# wget

--02:39:18-- Resolving centos.ustc.edu.cn... 202.141.160.110, 2001:da8:d800:95::110 Connecting to centos.ustc.edu.cn|202.141.160.110|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 21033 (21K) [application/x-redhat-package-manager] Saving to: `yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm'

100%[=======================================>] 21,033 --.-K/s in 0.06s

02:39:19 (331 KB/s) - `yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm' saved [21033/21033]

[root@localhost ~]# pm -ivh yum-

bash: pm: command not found

[root@localhost ~]# rpm -ivh yum- warning: yum-3.2.22-40.el5.centos.noarch.rpm: Header V3 DSA signature: NOKEY, key ID e8562897 Preparing... ########################################### [100%] 1:yum-metadata-parser ########################################### [ 33%] 2:yum-fastestmirror ########################################### [ 67%] 3:yum ########################################### [100%] [root@localhost ~]# wget --02:40:08-- Resolving docs.linuxtone.org... 117.79.157.57 Connecting to docs.linuxtone.org|117.79.157.57|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1426 (1.4K) [application/octet-stream] Saving to: `CentOS-Base.repo'

100%[=======================================>] 1,426 --.-K/s in 0s

02:40:09 (192 MB/s) - `CentOS-Base.repo' saved [1426/1426]

[root@localhost ~]# yum makecache

Loaded plugins: fastestmirror Determining fastest mirrors Metadata Cache Created

注意：如果遇到没签名的程序，但你确定它是安全的，此时可以添加--nogpgcheck参数。