Linux常见问题汇总

Linux问题：

ifconfig查看IP地下载报错：bash: ifconfig: commandnotfound

解决方法：

先执行 export PATH="$PATH:/sbin" 然后就可以了

 

安装apache的问题：

初次接触PHP环境，自己手动配置apache与php，遇到httpd.exe: Could not reliably determine the server's fully qualified domain name, using 192.168.1.xx for ServerName这个问题

解决方法：

vi /etc/httpd/conf/httpd.conf 将里面的 #ServerName localhost:80 注释去掉即可。

 

安装PHP的问题：

configure:error:cannot find output from lex,give up，此错误是说 缺少flex.rpm，从linux 6.0光盘中找到flex-2.5.4a-29.i386.rpm

解决方法：

在/media/RHEL_5.5 i386 DVD/Server中rpm -ivh flex-2.5.4a-29.i386.rpm

 

configure: error: xml2-config not found. Please check your libxml2 installation.

 

错误原因，xml2-config这个文件没找到。

／＊原因可能出在我这次安装redhat，有很多东西没选上，所以出此问题。＊／
根据错误提示，安装libxml2。RHEL_5.2的安装光盘上提供了很多rpm包，我的是dvd光盘，位置在/media/RHEL_5.2 i386 DVD/Server，
cd /media/RHEL_5.2 i386 DVD/Server
ls *libxml*

[root@localhost Server]# ls *libxml*
libxml2-2.6.26-2.1.2.1.i386.rpm        libxml2-python-2.6.26-2.1.2.1.i386.rpm
libxml2-devel-2.6.26-2.1.2.1.i386.rpm  perl-libxml-perl-0.08-1.2.1.noarch.rpm
[root@localhost Server]# rpm -ivh libxml2-python-2.6.26-2.1.2.1.i386.rpm
warning: libxml2-python-2.6.26-2.1.2.1.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing...                ########################################### [100%]
        package libxml2-python-2.6.26-2.1.2.1 is already installed  /*提示我已经安装过了＊／
[root@localhost Server]# rpm -ivh libxml2-devel-2.6.26-2.1.2.1.i386.rpm
warning: libxml2-devel-2.6.26-2.1.2.1.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
error: Failed dependencies:
        zlib-devel is needed by libxml2-devel-2.6.26-2.1.2.1.i386
[root@localhost Server]# ls *zlib-devel*
zlib-devel-1.2.3-3.i386.rpm
[root@localhost Server]# rpm -ivh zlib-devel-1.2.3-3.i386.rpm
warning: zlib-devel-1.2.3-3.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing...                ########################################### [100%]
   1:zlib-devel             ########################################### [100%]
[root@localhost Server]# rpm -ivh libxml2-devel-2.6.26-2.1.2.1.i386.rpm
warning: libxml2-devel-2.6.26-2.1.2.1.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
Preparing...                ########################################### [100%]
   1:libxml2-devel          ########################################### [100%]
[root@localhost Server]#

好了，没有问题了