A programmer's site

Thinkpad T410s, Install Ubuntu 10.10 64bit

I bought a Lenovo Thinpad T410s a few days ago. After install ubuntu 10.10 64bit, Everything works out of the box: 1. Graphics : yes ( Intel HD, the VGA is blurred. With a DP to DVI adaptor, OK; NVS 3100M, VGA is OK ) 2. Intel SSD, works great, a few tweeks : SSD linux optimization 3. Fingerprint Reader (not tested, I disable it from bios) 4. Wireless, Thinkpad bgn: Yes 5. Ethernet: Yes 6. Camera: Yes 7. Microphone, Audio: Yes 8. SmartCard Reader: Yes

Trackpad multitouch feature

xinput set-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Scrolling" 1 1
 xinput set-prop "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 20

TrackPoint

echo -n 210 > /sys/devices/platform/i8042/serio1/serio2/speed
 echo -n 250 > /sys/devices/platform/i8042/serio1/serio2/sensitivity

Display NVS 3100M To enable brightness control in X, append ‘Option “RegistryDwords” “EnableBrightnessControl=1”’ to the Device-Section of xorg.conf.

Flash Player

sudo add-apt-repository ppa:sevenmachines/flash && sudo apt-get update && sudo apt-get install flashplugin64-installer

Color: Blue Cast, correct

Linux SSD 优化 -- for ubuntu 10.10 64bit

The conf I make to make less write to SSD, thus make it run a little faster. It’s quite dangerous, since log are not kept and other compromises.

On my dev machine, which has 8G memory and a SSD, works quite good, trade memory and safety for speed.

All my source code are sync to remote git repository. On my dev machine, which has nothing but code, I already have safety.

• 修改/etc/fstab, 为每个分区加上 noatime,data=writeback。/dev/sda1为/ 分区

sudo tune2fs -o journal_data_writeback /dev/sda1

• edit /etc/fstab：

tmpfs /tmp tmpfs defaults 0 0
 tmpfs /var/log tmpfs defaults 0 0
 tmpfs /var/tmp tmpfs defaults 0 0

• 修改/etc/default/grub

GRUB_CMDLINE_LINUX="elevator=noop"
 GRUB_TERMINAL=console #not for speed, it looks better
 GRUB_TIMEOUT=2

• before using apt-get:

sudo mount tmpfs /var/cache/apt/archives -t tmpfs
 mkdir /var/cache/apt/archives/partial

• browser cache:
  • firefox: browser.cache.disk.parent_directory = /tmp
  • chrome: –user-data-dir=/tmp

Google Chrome’s Special about Pages

• about:blank
• about:cache
• about:crash
• about:credits
• about:dns
• about:histograms
• about:net-internals
• about:plugins
• about:terms
• about:version
• about: (same as about:version)
• about:flags
• chrome://about (same as about:version)
• chrome://bookmark
• chrome://download chrome://extensions
• chrome://favicon chrome://history
• chrome://thumb
• chrome://view-http-cache (same as about:cache)

Imdisk 虚拟磁盘

imdisk

ImDisk is a virtual disk driver for Windows NT/2000/XP/2003/Vista/2008. It can create virtual hard disk, floppy or CD/DVD drives using image files or system memory

在windows 7 上时使用时，需要解决权限问题，方法之一是用admin 权限在cmd下运行 这两条命令 详情

sc config imdisk start=auto
  net start imdisk

1. imdisk可以当虚拟光驱用，挂载iso文件,就像linux的

mount -o loop

1. 用system memory 创建的磁盘, 就像linux 的tmpfs，访问速度很快: 。

这条命令

imdisk -a -s 5G -p "/fs:ntfs /q /y" -m \#:

在我的机器上创建了一个5个G的虚拟硬盘，并且格式化，分配一个没有使用的盘符。（我用的是64为的windows 7， 在32位系统上受限于32位虚拟内存地址，可能只能创建2G左右，imdisk是按需 使用内存的，像linux的tmpfs） ### imdisk 用途

• 做为ie，firefox，chrome等浏览器的缓存
• 做为系统的临时目录
• 挂在ISO文件
• ……

google chrome 设置路径的方式

–user-data-dir=e:

firefox设置的方式是：

browser.cache.disk.parent_directory=e:

方便日常电脑使用，加快电脑速度。

在linux下，做这些事情方便：mount

# add the following line to /etc/fstab
 tmpfs /tmp tmpfs defaults 0 0

Guava, an open source JAVA library from google

大概半年以前就听说了guava, an open source java library from google. 今天看了youtube上找到关于它的两个视频，大约一个半小时。

Youtube - Using the Google Collections Library for Java (1 of 2)

Youtube - Using the Google Collections Library for Java (2 of 2)

确实挺好的，推荐使用, maven配置

        com.google.code.findbugs
        jsr305
        1.3.9
   
   
        com.google.guava
        guava
        r07