Njava

在64位Ubuntu12.04上安装32位的官方QQ

njava — Thu, 10 May 2012 09:22:38 +0000

官方linuxQQ版本上一次更新时间是2009年，linux下名副其实的烂尾工程，
使用命令强行安装

sudo dpkg -i --force-all linuxqq_v1.0.2-beta1_i386.deb

ubuntu和macos在右上角增加系统状态监控system monitor

njava — Thu, 10 May 2012 05:35:26 +0000

在ubuntu下面可以使用sudo apt-get install indicator-multiload

ubuntu12.04

在mac下使用免费的MenuMeters

http://www.ragingmenace.com/software/menumeters/index.html

Ubuntu解决不能远程访问snmp协议的

njava — Tue, 01 May 2012 15:24:49 +0000

需要远程使用snmp，发现ubuntu9.04上不支持远程访问，google了一下解决办法如下
编辑 /etc/default/snmpd

$sudo vi /etc/default/snmpd
# This file controls the activity of snmpd and snmptrapd
# MIB directories.  /usr/share/snmp/mibs is the default, but
# including it here avoids some strange problems.
export MIBDIRS=/usr/share/snmp/mibs

# snmpd control (yes means start daemon).
SNMPDRUN=yes

# snmpd options (use syslog, close stdin/out/err).
#SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -g snmp -I -smux -p /var/run/snmpd.pid 127.0.0.1'
SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -g snmp -I -smux -p /var/run/snmpd.pid'

去掉snmpdopts中的127.0.0.1绑定

ubuntu的dns服务器设置resolv.conf

njava — Mon, 30 Apr 2012 14:49:38 +0000

一起一直修改/etc/resolv.conf中加入

nameserver 8.8.8.8

现在更新却不行了，自定义的/etc/resolv.conf被系统覆盖了，出现了

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

搜索了一下解决办法，在/etc/resolvconf/resolv.conf.d/base里添加

$sudo vi /etc/resolvconf/resolv.conf.d/base
nameserver 8.8.8.8

之后，每次重启之后/etc/resolv.conf中就回自动生成自定义的dns服务器信息了

使用persona　for cacti插件监控mysql

njava — Fri, 27 Apr 2012 04:39:08 +0000

需要mysql调优，安装了一个cacti监控插件 Percona Monitoring Plugins ，
官方地址：http://www.percona.com/software/percona-monitoring-plugins/

1 下载　percona-monitoring-plugins-1.0.0.tar.gz
2 上传　ss_get_mysql_stats.php 到cacti的scripts目录/usr/share/cacti/site/scripts
3 进入cacti的web页面import 数据模版cacti_host_template_percona_mysql_server_ht_0.8.6i-sver1.0.0.xml
4 设置ss_get_mysql_stats.php里的mysql账号链接
5 Percona Monitoring Plugins参考文档：http://form.percona.com/rs/percona/images/Percona_Monitoring_Plugins_100_Operations_Manual.pdf

在ubuntu上设置discuz远程附件

njava — Fri, 27 Apr 2012 03:01:01 +0000

1 安装sftpd

 sudo apt-get install vsftpd

2 设置ftp

 /etc/vsftpd.conf
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
local_umask=022

3 增加用户

useradd  -m ftp-user

4 将用户HOME目录链接到网站附件域名下

sudo ln -s /home/ftp-user /var/www/njava-att

使用VIM作为git的默认编辑器

njava — Thu, 19 Apr 2012 02:46:59 +0000

git config –global core.editor vim

检查Mac是否感染了Flashback病毒

njava — Sat, 07 Apr 2012 03:43:48 +0000

defaults read /Applications/Safari.app/Contents/Info LSEnvironment
defaults read ~/.MacOSX/environment DYLD_INSERT_LIBRARIES

如果都是does not exist，那么没有中毒，哇哈哈

合理计算mysql最大连接数max_connections

njava — Wed, 04 Apr 2012 05:27:40 +0000

mysql经常出现MySQL: ERROR 1040: Too many connections，需要重新设置max_connections怎么才算合理呢？
１　查看当前mysql最大连接数
show global status like ‘Max_used_connections’;

２　设置max_connections值:Max_used_connections/max_connections=80%

解决nginx＋FastCGI经常报502的问题

njava — Tue, 03 Apr 2012 13:24:52 +0000

1查看php4-cgi打开数量

sudo netstat -anpo | grep “php5-cgi” | wc -l

2设置nginx.conf参数
http
{
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
}