计算机领域学习路线图 roadmap

mod_apache_snmp, net-SNMP (给apache2添加SNMP支持)

Tested on platform: #

• vmware

• Linux ubuntu 2.6.32-38-generic #83-Ubuntu SMP Wed Jan 4 11:13:04 UTC 2012 i686 GNU/Linux

• DISTRIB_ID=Ubuntu; DISTRIB_RELEASE=10.04; DISTRIB_DESCRIPTION=“Ubuntu 10.04.4 LTS”

• httpd-2.0.64.tar.bz2; net-snmp-5.4.4; mod_ap2_snmp_1.04.

• sudo -s;

• apt-get remove lamp-server^ snmpd # if you have already installed apache or snmp-server.

Just do it: #

http://mod-apache-snmp.sourceforge.net/english/docs.htm

(below is a summary)

1) Install Apache Web Server with DSO support enabled.

./configure --enable-so; make; make install

2) Unzip NET-SNMP sources.

ubuntu 7 install vmware tools

The path "" is not valid path to the gcc binary. Would you like to change it? [yes] 

when typed in "/usr/bin/gcc" manually,

The path "/usr/bin/gcc" is not valid path to the gcc binary. Would you like to change it? [yes]

I found solution:

http://superuser.com/questions/192047/gcc-path-not-valid-when-installing-vmware-tools-from-vmware-workstation-7-1-1-bu

ie: sudo apt-get install linux-source linux-headers-uname -r libglib2.0-0

// Got “If you wish to have the shared folders feature, you can install the driver by running vmware-config-tools.pl again after making sure that gcc, binutils, make and the kernel sources for your running kernel are installed” before install “linux-source”.

乱码putty支持中文utf8输入和显示

ref: networkquestions.org

Note: Putty officially recommends to use Bitvise SSH Client & Server.

终端默认是使用windows的编码方式（GBK），我们需要手动改为UTF-8

再次重启的时候就不会是乱码了：

[root@mail ~]# service httpd restart
停止 httpd：                                               [确定]
启动 httpd：                                               [确定]
[root@mail ~]#

这是终端的乱码问题，再说一下打开中文文件乱码问题。

在很多的配置文件中，含有中文，用vi打开时也是会乱码。首先我们系统中要有中文语言显示包（fonts-chinese），否则改为UTF-8也是会乱码。
[root@mail ~]# cat /etc/sysconfig/i18n
LANG=”zh_CN.UTF-8″
[root@mail ~]#
上面的设置，系统语言为中文，如果想改为英文的话，替换为：

LANG=”en_US.UTF-8″  保存即可。

临时性改变语言：export LANG=en_US.UTF-8

echo $LANG   //查看语言

另一个:

ref: ylmf.net

字符乱码:

在window-〉Appearance-〉Translation中，Received data assumed to be in which character set 中,把Use font encoding改为UTF-8.

如果经常使用,把这些设置保存在session里面.

/* 下面的有待研究 ….

登录成功后,在shell中输入:export LC_ALL=‘zh_CN.utf8’,现在已经可以完美的支持中文了.

打开putty主程序，选择window-〉Appearance-〉Font settings-〉Change…,选择Fixedsys字体,字符集选择CHINESE_GB2312。

默认情况下，putty对中文的支持却让人不敢恭维，如果远程linux的locale设置为zh_CN.*(bg2312,gbk,utf8等等)，显示就是乱码。经研究发现，其实putty的中文支持还是很好的，呵呵

*/

OpenSwan IPSec setup configuration

[bak] Sar 监控命令小览

see also jlevy/the-art-of-command-line (multi-language)

from: qa.taobao.com

最近接触了下淘宝的性能框架PAP，觉得系统中的监控真的做的很不错，但是非pap运行的程序，则无法监控，同时也查了下淘宝性能百科对监控命令Sar介绍，觉得讲的比较粗，这里把自己以前用过的Sar监控分享下；有问题，大家共勉哈！

System/Network Measuring/Monitoring Theory & Tools

See also: Network Hardware - Fiber: /fiber.
NMAP: /nmap.

Private IPv4 Network & Ranges #

• 10.0.0.0/8 ( 10.0.0.0 - 10.255.255.255 );
• 172.16.0.0/12 ( 172.16.0.0 - 172.31.255.255 );
• 192.168.0.0/16 ( 192.168.0.0 - 192.168.255.255 )

ref: 内网 IP 段有哪些

Tools #

trace route #

• mtr (my traceroute / traceroute 2.0)

real-time speed #

• bmon (graph)
  • multi-interface
• nload (graph)
  • unit : (k)bit
  • min, max, avg, total
  • (avg is the same as nethogs)
• slurm (graph);
  • slurm -i wlan0
• nethogs
  • sudo nethogs wlan0
  • pid, user, program
  • CPU-consuming
  • (stable, the same as avg of nload)
• ifstat
  • scrolling text
• iftop (current graph)
  • [speed per connection] nic is needed, otherwise wired by default.
  • sudo iftop -i wlan0
  • unit : (k)bit
  • Reverse-DNS (don’t like it , use ’n’ to toggl)
• dstat
  • scrolling text
  • // all stat of system
• ntop // TODO, how-to
• sar // all stat of system (cpu/net/ram/io) (see: sar )
• sudo nethogs // network [speed per rprogress & PID], like htop for progresses

network traffic capturing #

• tcpDump + tcpTrace (similar to wireshark)
• http://fasterdata.es.net/fasterdata/network-troubleshooting-tools/tcpdump-tcptrace/
• tcptrace.org
• ipTraf (looks better than tcpdump)
• nGrep //netGrep
• netsniff-ng.org (zero-copy, pacp)
• DAG + DPMI and sunny’s modified tools

For windows, use Wireshark. For localhost in windows, use RawCap+Wireshark.

一个女留学生的七年

http://emuch.net/html/201004/1951179.html

如果说本科期间我拓宽了一下知识面算是个收获的理由,那么这一年半我真是对不起我自己了.

还有半年,我能做的就是"struggle for success"了,向这个女生学习.

也向zq和那个泰国人借鉴"just do it"的优点.

还有半年, 半年后我是谁?

我有我的plan

立此存照

 的plan

立此存照

 nbsp;

eric crash

ubuntu 11.10 64bit.

eric4 启动后窗口一闪即告崩溃。

命令窗口启动发现：

Connected to accessibility bus at: “unix:abstract=/tmp/dbus-5rwqiiCSZ1,guid=a3330f45019a77c867e77525000000a2”
Registered DEC: true

sudo 正常启动，无此提示，因此怀疑是环境变量的问题。

g后发现：

http://ubuntuforums.org/showthread.php?t=1861605

即：

export QT_ACCESSIBILITY=0

问题解决。

ps:

Accessibility in Qt #

by Geir Vattekar

小企鹅fcitx输入法安装, 中文gnome,英文kde

Ubuntu 18.04 #

The default ibus-based Chinese input method is ready to use.
Thus, just change the language & input settings.

Kubuntu #

For Kubuntu 18.04, it is a good way to install fcitx-based methods.

sudo -s
apt install fcitx fcitx-googlepinyin
cat >>/etc/environment <<EOD
GTK_IM_MODULE=fcitx
QT_IM_MODULE=fcitx
XMODIFIERS=@im=fcitx
EOD

设置》启动》添加自启动项（startup）: fcitx -d
Xubuntu 在 开始菜单》所有设置 里面。
Lubuntu 在 开始菜单》Preferences->Default applications for LXSession
(建议默认英文输入法)
重新登录后，Ctrl + 空格可以调用输入法，shift 切换中英文。

dated below #

ubuntu 11.10 64bit, fcitx 4.1