一、安装
yum install bind-utils -y
二、使用
（1）指定某DNS查询一个域名。以www.people.cn为例。
dig www.people.cn @dns address
（2）查询A记录
dig www.people.cn A +noall +answer @dns address
（3）查询权威DNS
dig www.people.cn NS +noall +answer @dns address
后面有其他继续增加
分类： 技术源码
Pureftpd+Mysql中的status参数不管用的解决方法
现象：Pureftpd+Mysql中的status参数设置为0表示账户不启用，1表示正常使用，重新安装了Pureftpd+Mysql后这个参数不起作用了
解决：pureftpd-mysql.conf 中有关于 Pureftpd 调用 Mysql 中各参数的简单例子，修改这里即可，下面是我的文件中的，大家按照自己的数据库列名字修改即可，把默认的注释掉，默认的是没有status以及ipaccess参数的
#ADD
MYSQLGetPW SELECT Password FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetUID SELECT Uid FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetGID SELECT Gid FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetDir SELECT Dir FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MySQLGetQTAFS SELECT QuotaFiles FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE"\R")
MySQLGetQTASZ SELECT QuotaSize FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MySQLGetRatioUL SELECT ULRatio FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetRatioDL SELECT DLRatio FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetBandwidthUL SELECT ULBandwidth FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetBandwidthDL SELECT DLBandwidth FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MYSQLGetPW SELECT Password FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetUID SELECT Uid FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetGID SELECT Gid FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MYSQLGetDir SELECT Dir FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MySQLGetQTAFS SELECT QuotaFiles FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE"\R")
MySQLGetQTASZ SELECT QuotaSize FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess = "*" OR ipaccess LIKE "\R")
MySQLGetRatioUL SELECT ULRatio FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetRatioDL SELECT DLRatio FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetBandwidthUL SELECT ULBandwidth FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
MySQLGetBandwidthDL SELECT DLBandwidth FROM users WHERE USER="\L" AND STATUS="1" AND (ipaccess ="*" OR ipaccess LIKE "\R")
WordPress 5.2 要求PHP版本最低为 5.6+
这样挺好，至少安全了一些！ 今天已升级。
免费SSL的解决方案（SSLFREE）
安全证书这个事情，有花钱的解决方案，还有不花钱的解决方案。咱们今天讲讲不花钱的方法，https://www.sslforfree.com/ ，在这个网站申请的证书，90天使用期，90天以后还需要重新申请。
第一步：生成SSL域名证书
点击Create Free SSL Certificate 生成域名证书
How do I ensure excel file with wide columns does not get truncated in Confluence File Previews（转）
Purpose
This article contain instructions on how to change the display of excel files in confluence File Preview / light box, mainly because by default, confluence file preview will truncate excel files with wide columns/ excel files with huge number of columns.
For example, below is a sample excel file with a huge number of columns:
Upon uploading to confluence, the columns will be truncated and will be displayed as below:
我在 什么值得买 上的文章链接-技术篇
Confluence 7.0.3 已经完成搭建，k 文件已发布（请移步新址，此贴封贴）
confluence，已经升级到了7.0.3了，请诸位移步
Confluence 7.6.0 及 Jira Software 8.4.2 安装及最新的k文件（更新Confluence 7.13.0、Jira Software 8.19.0安装包）
VMware vCenter Server 6.5.0 U1g
转自https://www.cnblogs.com/saszhuqing/p/8742997.html
Name: VMware-VCSA-all-6.5.0-8024368.iso Release Date: 2018-03-20 Build Number: 8024368
Name: VMware-vCenter-Server-Appliance-6.5.0.15000-8024368-updaterepo.zip Release Date: 2018-03-20 Build Number: 8024368
Name: VMware-VIM-all-6.5.0-8024368.iso Release Date: 2018-03-20 Build Number: 8024368
链接: https://pan.baidu.com/s/1bVW5sv8tAJNELo8vZhUQVw 密码: ubxq
360极速和兼容模式显示不同内容的解决方法
从外面扒下来一个index文件，在360极速模式下均正常，但一旦切换到兼容模式，样式表就感觉加载不上了，IE同兼容模式，显示都是有问题的，后来设计部的同事给了一个解决方法：加入
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE9,chrome=1" />
经过测试，问题解决。
Rhel 5 下umount 不了 nfs 目录的解决方法
有一台Rhel5，mount的时候一切正常，umount就hang掉了，一直不动，查了一些方法，最好用的就是加 -l 参数
umount -l /mnt/xxx
然后我希望reboot的时候不用干预，把umount alias 成 umount -l
vi ~/.bashrc
User specific aliases and functions
alias rm=’rm -i’
alias cp=’cp -i’
alias mv=’mv -i’
alias umount=’umount -l’
加一条umount
. ~/.bashrc
但测试 reboot 的时候还是不行，后来想这台机器是P2V过来的，之前一切正常，这回换了新NFS的地址，加了防火墙，所以，就让网络的同事开通了如下端口
program vers proto port service
100011 1 udp 4049 rquotad
100024 1 tcp 4047 status
100024 1 udp 4047 status
100021 4 tcp 4045 nlockmgr
100021 3 tcp 4045 nlockmgr
100021 1 tcp 4045 nlockmgr
100021 4 udp 4045 nlockmgr
100021 3 udp 4045 nlockmgr
100021 1 udp 4045 nlockmgr
100005 3 tcp 4046 mountd
100003 3 tcp 2049 nfs
100005 2 tcp 4046 mountd
100005 1 tcp 4046 mountd
100003 2 tcp 2049 nfs
100005 3 udp 4046 mountd
100003 3 udp 2049 nfs
100005 2 udp 4046 mountd
100005 1 udp 4046 mountd
100003 2 udp 2049 nfs
100000 2 tcp 111 rpcbind
100000 2 udp 111 rpcbind
测试机器mount,umount,reboot一切正常了。如果大家umount 不动不报错，那么可以试试-v参数，这个可以详细输出umount执行时候的信息。