centos7 nfs客户端挂载问题

配置nfs服务器时，服务器端挂载没有问题，但是客户端挂载时提示：mount.nfs: Connection timed out解决方法1：关闭 firewalld # systemctl stop firewalld # firewall-cmd --state not running 解决方法2：rpcinfo -p显示如下： program vers proto port ser...

解决centos系统远程连接慢

刚安装centos6.5的系统，发现ssh连接很慢，因为是实验境，对安全的要求不高，所以完全可以更快的连接，下面一起来解决这个问题。 一.分析原因 1.SSH的反向DNS解析会消耗大量时间 2.GSS认证会消耗时间 二.解决办法 1.服务器端设置 1.1.编辑sshd_config 1 2 3...

VFS:unable to mount the root fs on (0,0)的解决方法

centos系统开机便报此错。 LFS kernel panic -not syncing :VFS:Unable to mount root fs on Unknown-block(0,0); 机房停电后，我们的服务器的centos系统开机便报此错。 LFS kernel panic -not syncing :VFS:Unable to mount root fs on Unknown-block(0,0);...

解决系统提示“ jackluo is not in the sudoers file”：

CentOS下执行sudo命令时，系统提示 jackluo is not in the sudoers file： 当在终端执行sudo命令时，系统提示 jackluo is not in the sudoers file： $ sudo ls Password: jackluo is not in the sudoers file. This incident will be reported. 1.切换到超级...

解决apache启动错误＂httpd:Could not reliably determine...＂

启动apache遇到错误：httpd: Could not reliably determine the servers fully qualified domain name [root@server httpd-2.2.4]# /usr/local/apache/bin/apachectl start httpd: Could not reliably determine the servers fully qualified domain name, us...

CentOS yum时出现＂Could not retrieve mirrorlist＂的解决办法

CentOS yum时出现Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5arch=i386repo=addons error 错误：[root@server mysql-5.0.56]# yum install gcc Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Could...

yum使用过程中的常见错误

(1) 使用yum安装相关软件包时一直提示以下错误：repodata/repomd.xml: [Errno 4] IOError: ， Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again (2) 使用yum安装相关软件包时出现如下错...

CentOS yum时出现＂Could not retrieve mirrorlist＂的解决办法

CentOS yum时出现Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5arch=i386repo=addons error 错误： [root@server mysql-5.0.56]# yum install gcc Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Coul...

yum install报错：Another app is currently holding the yum lock

在CentOS上yum -y install gcc* gcc-c++* autoconf* automake* zlib* libxml* ncurses-devel* libmcrypt* libtool*时出现错误： 1）怎么回事呢？根据提示，原来是系统进程已经有一个update在运行了。在进程里查看下：ps -ef | grep update 2）通过kill杀掉这...

yum ＂Couldn't resolve host 'mirrorlist.centos.org'＂ for CentOS 6

yum Couldnt resolve host mirrorlist.centos.org for CentOS 6 I ran into an issue recently where I could ping URLs just fine, but when I ran the yum update command yum could not resolve anything. I would get error messages like the following...