[Vim] Some plugins for Vim

紀錄一下我在用的plugin,隨時會更新

1.Comment/Un-Comment
How to use?

<Ctrl-C> To comment
<Ctrl-X> To un-comment

How to install?

For VIM 6 and higher, stick this file in your ~/.vim/plugin directory or in some other 'plugin' directory that is in your runtime path

[阿宅專區] Toolbars on Internet Explorer

沒想到我的標籤竟然也要增加這一區了... 囧rz
而且是因為這個月都還沒寫一篇比較完整的文章,只好濫竽充數一下 ㄎㄎ

廢話不多說,今天胡亂逛,發現幾張圖蠻有趣的,以後也許會用到,先偷過來用,標題是"Toolbars on Internet Explorer"

source:http://www.ctbytes.com/blog/wp-content/uploads/2010/02/toolbars2-small.gif

看一張更厲害的

source:http://www.nuk3.com/gallery/images/comedy/full/308.jpg

謝謝觀賞

[Android] Install Android market in Android emulator 2.2

使用SDK下載回來的avd:
1.Download Android market apk

$ wget http://goo.gl/dz3ZB

2.Create froyo AVD

$ android create avd --target 8 --name froyo

3.Start emulator

$ emulator -avd froyo -partition-size 96

3.Modified build.prop and comment "ro.config.nocheckin=yes"

$ adb pull /system/build.prop
$ vim build.prop

#ro.config.nocheckin=yes

4.Restore to system

$ adb remount /system
$ adb push build.prop /system

5.Remove SdkSetup.apk

$ adb shell rm /system/app/SdkSetup.apk
$ adb push GoogleServicesFramework.apk /system/app
$ adb push Vending.apk /system/app

6.Shut down the emulator

$ adb reboot

7.Remove emulator image

$ cd /path/to/avd
$ rm userdata-qemu.img userdata.img cache.img

8.Restart emulator


使用自己編出來的system.img:
1.直接安裝Vending.apk和GoogleServicesFramework.apk就好了

$ adb install GoogleServicesFramework.apk
$ adb install Vending.apk

2.Restart emulator

reference:
* [Android]在SDK 2.2模擬器中安裝Market

[Security] 看雪論壇十週年

大陸最有名的資訊安全論壇看雪論壇發中秋禮物(當然還有很多有名的論壇,比如說邪惡八進制等...),裡面有很多好東西,先備份一下,未來再慢慢研究吧...

順道一提完全無關的事,就是剛好在備份的時候發現,不同的壓縮演算法其實壓縮比差蠻多的,我是比了bzip2,rar,gzip,zip四種格式而已(使用預設壓縮比率)

-rw-r--r--  1 44768826 2010-11-24 11:11 pediy.tar.bz
-rw-r--r--  1 47059808 2010-11-24 11:25 pediy.rar
-rw-r--r--  1 45356338 2010-11-24 11:27 pediy.tar.gz
-rw-r--r--  1 45355127 2010-11-24 11:18 pediy.zip

這四種格式看起來是bzip2的壓縮效率最好,雖然沒有在網路上找到壓縮比的評比來實證,但wikipedia還是有列出一些其他方面的比較

[Tips] Tips to make Ubuntu faster

最近遇到問題是檔案夾開啟的速度非常緩慢,就看看是否有什麼方法可以調整一下Ubuntu的效能,目前照網路上常見的幾招來改,看起來效果不錯: )

1.更改置換檔(swap)使用率設定

$ sudo vim /etc/sysctl.conf

新增一行

vm.swappiness=10

重啟sysctl讓設定生效

$ sudo sysctl -p

2.使用readahead(不用設定)

$ sudo apt-get install readahead

3.使用localepurge清除不需要的語言檔

$ sudo apt-get install localepurge

4.使用Preload(不用設定)

$ sudo apt-get install preload

5.使用Prelink

$ sudo apt-get install prelink

修改設定

$ sudo vim /etc/default/prelink

新增一行

PRELINKING=yes

執行cron

$ /etc/cron.daily/prelink

6.關閉不需要的Gnome作業階段

System -> Preferences -> Startup Applications

7.關閉不必要的系統服務(Service)
以sysv-rc-conf修改不同runlevel服務啟動的狀態

$ sudo apt-get install sysv-rc-conf
$ sudo sysv-rc-conf

8.同步啟動(Concurrent Booting)
修改啟動的rc設定檔

$ sudo vim /etc/init.d/rc

修改CONCURRENCY從none改為shell

CONCURRENCY=shell

有些設定還沒完全瞭解原理,之後碰到再寫清楚吧

reference: Ubuntu 進階優化和調校

[Android] Build Android bootchart

bootchart是一套可視覺化分析GNU/Linux啟動過程的工具,它可蒐集啟動的資訊,並產生PNG/SVG/EPS等格式的圖檔,提供我們做進一步的效能分析,以下簡述安裝過程:

1.安裝bootchart工具

$ sudo apt-get install bootchart

2.重新編譯init(讓init支援bootchart)
切換到Android source code目錄下

$ cd /path/to/android

改變init系統時間

$ touch system/core/init/init.c

載入Android bash工具

$ . build/envsetup.sh

編譯init模組

$ m INIT_BOOTCHART=true

啟動機器

$ emulator -system {/path/to}/system.img -data {/path/to}/userdata.img -ramdisk {/path/to}/ramdisk.img

設定init的time out

$ adb shell 'echo 180 > /data/bootchart-start'
$ adb shell 'mkdir /data/bootchart'

3.重新啟動機器

$ adb reboot

4.重新開機完成後檢視是否有紀錄

$ adb shell ls /data/bootchart

header
kernel_pacct
proc_diskstats.log
proc_ps.log
proc_stat.log

5.下載開機紀錄

$ cd /whatever/path
$ adb pull /data/bootchart/header
$ adb pull /data/bootchart/kernel_pacct
$ adb pull /data/bootchart/proc_diskstats.log
$ adb pull /data/bootchart/proc_ps.log
$ adb pull /data/bootchart/proc_stat.log

6.產生bootchart.tgz

$ {path/to/android}/system/core/init/grab-bootchart.sh

7.產生bootchart圖檔

$ java -jar /usr/share/bootchart/bootchart.jar bootchart.tgz

Parsing /tmp/android-bootchart/bootchart.tgz
Wrote image: ./bootchart.png

如果沒有/usr/share/bootchar/bootchart.jar這個檔案,可以在這裡取得source,解開後執行ant將會編出bootchart.jar

reference:
* Build Android Bootchart
* Using Bootchart on Android

[Android] Modify ramdisk.img on Android

ramdisk.img

A small partition image with gzipped cpio archive that is mounted read-only by the kernel at boot time. It only contains /init and a few config files. It is used to start init which will mount the rest of the system images properly and run the init procedure. A Ramdisk is a standard Linux feature.

system.img

A partition image that will be mounted as /system and thus contains all system binaries

userdata.img

A partition image that can be mounted as /data and thus contains all application-specific and user-specific data.

Here is the steps:
1.Change directory to whatever/path

$ cd whatever/path

2.Copy the original ramdisk.img

$ cp /path/to/ramdisk.img .

3.Create a temporary folder, say ramdisk-ext

$ mkdir ramdisk-ext

4.Change directory to ramdisk-ext

$ cd ramdisk-ext

5.Extract the ramdisk.cpio in the ramdisk-ext folder

$ gunzip -dcv ../ramdisk.img | cpio -idm

6.Check out the directories in ramdisk.img

$ ls

data          dev   init.goldfish.rc  proc  sys
default.prop  init  init.rc           sbin  system

7.Do some modifications

$ touch foo
$ mkdir bar

8.Recreate the ramdisk.cpio

$ find . | cpio -H newc -o | gzip -9 >../ramdisk.img

9.Start the emulator

$ emulator -system system.img -data userdata.img -ramdisk ramdisk.img

10.Check out the directories in the emulator

$ adb shell ls -l

drwxrwxrwt root     root              2010-11-26 16:54 sqlite_stmt_journals
drwxrwx--- system   cache             2010-11-26 16:54 cache
d--------- system   system            2010-11-26 16:54 sdcard
lrwxrwxrwx root     root              2010-11-26 16:54 etc -> /system/etc
drwxr-xr-x root     root              2010-11-15 07:33 system
drwxr-xr-x system   system            2010-11-26 16:53 bar
drwxr-x--- system   system            2010-11-26 16:52 sbin
-rwxr-x--- system   system       1677 1970-01-01 00:00 init.goldfish.rc
dr-xr-xr-x root     root              1970-01-01 00:00 proc
-rw-r--r-- system   system          0 2010-11-26 16:52 foo
-rwxr-x--- system   system     106696 1970-01-01 00:00 init
-rwxr-x--- system   system      10700 1970-01-01 00:00 init.rc
drwxr-xr-x root     root              1970-01-01 00:00 sys
-rw-r--r-- system   system        118 1970-01-01 00:00 default.prop
drwxrwx--x system   system            2010-11-16 09:04 data
drwx------ root     root              2009-08-07 03:35 root
drwxr-xr-x root     root              2010-11-26 16:54 dev

gunzip options:

-c, --stdout      write on standard output, keep original files unchanged
-d, --decompress  decompress
-v, --verbose     verbose mode
-1, --fast        compress faster
-9, --best        compress better

cpio options:

-i, --extract                    Extract files from an archive (run in copy-in mode)
-d, --make-directories           Create leading directories where needed
-m, --preserve-modification-time Retain previous file modification times when creating files
-H, --format=FORMAT              Use given archive FORMAT
-c                               Use the old portable (ASCII) archive format
-o, --create                     Create the archive (run in copy-out mode)
-v, --verbose                    Verbosely list the files processed
-B                               Set the I/O block size to 5120 bytes
-u, --unconditional              Replace all files unconditionally

Examples:
  cpio -covB  > [file|device]<== Backup
  cpio -icduv < [file|device]<== Restore

"-H newc" use the new (SVR4) portable format. If you wish the old portable (ASCII) archive format, use "-H odc" instead. 

reference:
* Android ramdisk.img system.img userdata.img
* android ramdisk的壓縮與解壓縮