One more thing

桃機路線

2016-02-16T13:02:00.001+08:00

[原則]

先走一高, 再走二高, 然後再走一高, 之後走五楊高架, 之後在桃園機場交流道下

[準備]
蠻牛
airwaves 嚼對有精神

[說明]

走一高

休息站: 新營, 西螺

時速: 110 km/h

之後, 過彰化交流道之後, 靠右邊, 準備要走國道3號

到了彰化系統交流道, 切到國道3號

休息站: 清水, 西湖

時速: 110 km/h

之後, 到了新竹系統交流道, 再切到國道一號

休息站: 湖口

時速: 100 km/h

過湖口休息站之後, 靠右邊, 準備要走五楊高架橋,

五楊高架橋, 會有前後 2 段高架橋,

第一段高架橋, 從楊梅這邊上去, 是 2 線道, 一直走, 直到下高架橋, 一直保持靠右行駛 (不要切到左邊)

過不久, 就會來到第2段高架橋, 是 3 線道, 之後, 準備在機場系統下

下桃園機場交流道之後, 持續靠左邊行駛

之後, 會看到一排指標 "二航出境", "4號停車場", "二航入境",

重點是, 要停 "4號停車場", 所以不要走 "二航出境"

4號停車場有分 B1, B2
就照指標寫的, 直接去停 B2 (B1應該沒有空車位)

在 B2, 車停好之後, 往機場大廳的方向走, 會看到手扶梯, 手扶梯右邊玻璃門進去, 有美食廣場 (starbucks, 7-11, ...)

在美食廣場, 也可以直接搭手扶梯, 上去 2F 出境大廳

彰化系統交流道

新竹系統交流道

五楊高架橋

"二航出境"指標

一排指標, "二航出境", "4號停車場", "二航入境"

"4號停車場"

桃機 4號停車場停車格

booting linux fro USB dongle through VMware fusion

2015-08-19T22:07:00.000+08:00

mba13:bt5r3-usb.vmwarevm admin$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS SSD 120.3 GB disk0s2
3: Apple_Boot Recovery HD 784.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: *1.1 GB disk1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: RamDisk *536.9 MB disk2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *250.1 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Apple_HFS datatale 249.2 GB disk3s2
3: Apple_Boot Recovery HD 650.0 MB disk3s3
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *64.0 GB disk4
1: Linux 61.9 GB disk4s1
2: Linux_Swap 2.1 GB disk4s5

/Applications/VMware\ Fusion.app/Contents/Library/vmware-rawdiskCreator create /dev/disk4 fullDevice ./rawDisk-sandisk lsilogic

Reference:
http://www.vijayp.ca/blog/2011/09/attaching-a-physical-raw-disk-to-vmware-fusion-4-without-bootcamp/

My OSX Experience

2015-03-06T10:00:00.000+08:00

Here write down my experience about max osx.

How to disable Podcast automatic download.

bootup ubuntu-server-14.10 from pxe

2014-12-22T13:03:00.002+08:00

step 1.
download netboot
wget -r --no-parent http://archive.ubuntu.com/ubuntu/dists/utopic/main/installer-i386/current/images/netboot/

step 2,
move netbook to /tftpboot/

step 3,
update /etc/dhcp/dhcpd.conf

subnet 192.168.32.0 netmask 255.255.255.0 {
range 192.168.32.2 192.168.32.254;
option routers 192.168.32.1;
option domain-name-servers 192.168.32.1;
filename "/netboot/pxelinux.0";
}

step 4.
power on the PC and choose boot from pxe option.

that's almost all.

bootup kali fro pxe

2014-12-22T09:47:00.002+08:00

Bootup kali from pxe is almost like the way in bt5r3.

The difference lists below,

/tftpboot/pxelinux.cfg/default

TIMEOUT 100

DEFAULT kali

PROMPT 1

DISPLAY /isolinux.msg

LABEL kali

KERNEL kali/install/vmlinuz

APPEND initrd=kali/install/initrd.gz BOOT=install boot=install nopersistent rw quiet vga=0x317 netboot=nfs nfsroot=192.168.32.1:/tftpboot/kali

By the way, this time my experiment is working on vmware fusion to test this function, during the experiment, the vmware fusion is looking for ldlinux.c32 instead pxelinux.0, so my workaround is to copy a ldlinux.c32 to /tftpboot.

( In kali, ldlinux.c32 is in /usr/lib/syslinux/. )

Troubleshoot,
If the monitor compliant resolution out of range, try to change the vga option, for example vga=0x314.

Reference
http://linuxandfriends.com/vga-modes-used-linux/

28232 and 64511

2014-12-17T23:44:00.004+08:00

28232 is a magic number.
it is different between 32768 and 61000.
32768 and 61000 is usually the definition of /proc/sys/net/ipv4/ip_local_port_range

so the whole story is that when i wrote a tcp client, i found that the maximum connection the tcp client created is always 28232, so i searched this number in google and found the reason.

The work around is
check the current definition first,
> cat /proc/sys/net/ipv4/ip_local_port_range

Change the definition
> echo "net.ipv4.ip_local_port_range = 1024 65535" >> /etc/sysctl.conf
> sysctl -p

After this setting, the maximum connection created by a tcp client will be 64511 - another magic number.

Reference:
http://www.cnblogs.com/yoleung/articles/1288568.html

Travel in Japan Day 7

2014-11-07T22:02:00.000+08:00

2014/01/23 第 7 天

今天的行程是, 先搬行李到道頓堀飯店, 再到 outlet 逛

Toyoko Inn

今天的早餐

從 toyoko inn check out 啦

開始推行李啦

再推

終於到了

checkin

準備去臨空城 outlet 啦

Outlet 到啦

摩天輪

在這家買了 2 支 OP

在這家買了 1組3隻刀具+1支剪刀

準備回難波

偶遇鐵人頭

下午逛街去

今天的甜點

今天的戰利品

Travel in Japan Day 6

2014-11-07T21:44:00.000+08:00

2014/01/22 第6天

今天的行程是去大阪環球影城 Universal City
1. 裡面沒啥東西吃
2. 排隊
3. 買紀念品

門票, 先在台灣旅行社買

環球影城門口

看完 Spiderman

合影

看完時光飛車

中餐 - 火雞腿肉

看完大白鯊

準備吃下午茶啦

wonderland

Hello Kitty

跟 Elmo 合影

跟 Spiderman 合影

合影

夜晚的環球影城

紀念品 (最後送光了)

天黑了

今天的晚餐

今天的飯後甜點

Travel in Japan Day 5

2014-11-02T18:18:00.002+08:00

2014/01/21 第5天

今天的行程是二条城, 清水寺

今天的溫度

車票

要搭公車啦

哇, 遇到休城

那就到此一遊, 繞城走一圈

準備去吃飯

中餐吃六傳屋胡麻擔擔麵

接下來去花見小路, 不過這個時間還滿冷清的

繞到八阪神社

現在是下午1點多

接下來去清水寺

路上遇到好吃的喜八郎

清水寺前的商店街好熱鬧

清水寺, 花錢買門票

這裡好高好可怕

買些御守

地主神社

從遠處看

吃湯豆腐

喝清酒

還有紅豆湯

準備回程, 買伴手禮啦

停下來吃點心 - 烤玉團子

來到宮崎駿專賣店

買紀念品 (最後送光了)

接下來去茶寮都路里, 吃甜點

要回飯店休息啦

最後回飯店, 還買一個便當, 當消夜

Travel in Japan Day 4

2014-10-31T23:29:00.003+08:00

2014-01-20

第4天行程, 早上去伏見稻荷, 奈良

今天的溫度

先買到奈良的車票

京阪特急 (Limit Express)

伏見稻荷到了

往伏見稻荷大社

車站內的全家

要離開伏見稻荷, 前往奈良

奈良到了

坐公車去奈良公園, 東大寺

路上隨處都可以看到鹿

今天的中餐志津香

吃完飯, 要去餵鹿了

奈良的 7-11, 滿滿的雪肌精

逛奈良這邊的商店街

中谷堂的紅豆麻糬

好吃

晚上散步到道頓崛

巧遇 4個屁股人, 之後要來住這裡

回飯店休息

配備

Travel in Japan Day 3

2014-10-25T14:11:00.001+08:00

2014/01/19

第3天行程, 到大阪港, 搭遊輪

天保山大摩天輪

海遊館, 不過這時候, 遊輪(聖瑪琍號?)在保養, 有點掃興, 那就到此一遊

在這邊巧遇 7-11, 趕快買"雪肌精"

買完雪肌精後, 先拿回飯店
今天戶外溫度 4度C

下個行程, 到四天王寺

天王寺站

難得一見的 7-11

喝甘酒

中餐吃八重勝炸物, 好吃

通天閣塔, 不過沒有上去
(其實是被昨天的空中庭園展望台嚇到有點腿軟)

下個景點, 黑門市場

黑門市場裡面的藥妝店, 很好逛

晚餐吃一蘭拉麵

這是飯後甜點 Pablo

飯後水果

戰利品

My DVD Disc Experience

2014-10-25T13:35:00.002+08:00

1. Use mkvtoolnix to add the subtitle file to the mp4 (or mkv ) file. The result will be a mkv file.
2. Use freemake video converter to convert the mkv file to DVD type, but don't program the DVD disc directly but save the ouput into a ISO file.
3. Use disc programmer, like Nero, to program the ISO file to the DVD disc.

Why don't program the DVD disc in freemake video converter, that's because freemake video converter will use the faster possible speed to program the DVD disc, but the result DVD disc sometimes will not be read smoothly by the generic DVD player.

But if I used Nero to program the DVD at the lowest speed (like 2x speed ), the result DVD disc seems play smoothly by the DVD player.

Travel in Japan Day 2

2014-10-25T12:20:00.000+08:00

2014-01-18

第2天到大阪歷史博物館

大阪城

2日乘車券

這天是好日子, 巧遇喜事

有名的猴子 (豐臣秀吉)

大阪城天守閣

在關西機場遊客中心拿的票券, 不用錢(?), 進天守閣就不用再買票啦

戶外很冷, 室內有暖氣

巡城的士兵

在關西機場遊客中心拿的票券, 進大阪歷史博物館, 不用再付錢啦

拿票券換入場券

繞著城內, 走去搭水上巴士

水上巴士, 也不用錢

水上巴士, 裡面也有暖氣

裡面很乾淨

水上巴士到港了, 下午的行程是逛百貨公司

地鐵的廣告

行人

第2天晚餐滝見小路

用遊客中心拿的票券換空中庭園的入場券, 也不用錢哦

在空中庭園眺望遠處

空中庭園合影

路過Yodobashi, 改天再逛

路過松屋, 改天再吃

Travel in Japan Day1

2014-10-25T11:15:00.003+08:00

2014-01-17

早上6點半到達桃園機場

(太久沒用相機, 都忘記怎麼拍照片了)

這 2 箱是空的

等待 checkin

抵達關西機場, 到旅客中心, 買折扣票券

4大行李箱

現在是日本下午1點半

關西到難波, 要先去飯店 checkin 啦

大阪 tokoyo inn

好吃的老爺爺蛋糕

到 BIC CAMERA 朝聖

第1天晚餐鶴橋風月大阪燒

最後會變脆脆的

glico 固力果

一蘭拉麵 (改天再吃)

Fablo 蛋糕 (改天再吃)

路過 apple store, 改天再進去

買了一件 N3B

My Apache Experience 2

2014-09-23T15:52:00.000+08:00

When I ran

/etc/init.d/apache2 restart

but the simple error was displayed like below

ERROR: apache2 failed to start

Finally, I found a way to find out the failure reason,

/etc/init.d/apache2 -d -v start

From the console output the progress message,

+ '[' 10 -lt 15 ']'

+ '[' -e /var/run/apache2.pid ']'

+ sleep 1

the startup program will check /var/run/apache2.pid existed or not,

but from the configuration file

/etc/apache2/modules.d/00_mpm.conf

the pid file is stored in /run/apache2.pid

so I modified the configuration file to update the pid file to /var/run.

Retry again /etc/init.d/apache2 and finally it is ok right now.

* Stopping apache2 ... [ ok ]

* Starting apache2 ... [ ok ]

Reference:

http://wonkabar.org/2012/09/10/gentoo-openrc-apache-and-monit-proper-starting-and-stopping/

Integrate PHP and Apache2 in Gentoo by emerge

2014-09-21T17:01:00.002+08:00

My experience to integrate PHP and apache in Gentoo by emerge

It is an easy way to install PHP in gentoo by "emerge --ask php", but it will not integrate PHP and Apache.

My solution is

in /etc/portage/package.use, add
dev-lang/php apache2

lets again "emerge --ask php",

The following USE changes are necessary to proceed:
#required by dev-lang/php-5.6.0, required by php (argument)
>=app-admin/eselect-php-0.7.1-r3 apache2

Use --autounmask-write to write changes to config files (honoring CONFIG_PROTECT).

The error is like to ask to install an external application, so the final solution is

in /etc/portage/package.usage, add
dev-lang/php apache2
>=app-admin/eselect-php-0.7.1-r3 apache2

So the result of "emerge --ask php" is like

localhost ~ # ls -l /usr/lib/apache2/modules/
total 1204
lrwxrwxrwx 1 root root 31 Sep 21 16:16 libphp5.so -> ../../php5.5/apache2/libphp5.so

in /etc/conf.d/apache2
APACHE2_OPTS="-D DEFAULT_VHOST -D INFO -D SSL -D SSL_DEFAULT_VHOST -D LANGUAGE -D PHP5"

Finally,
/etc/init.d/apache2 restart

Install Apache in Gentoo by emerge

2014-09-21T16:49:00.002+08:00

My experience of installing Apache in Gentoo by emerge.

By emerge to install apache in gentoo is very straightforward, just "emerge --ask apache" and done.
But the default, there is no any mod_auth_digest.so.

lets build mod_auth_digest.so for apache.

localhost ~ # emerge -pv apache

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild R ] www-servers/apache-2.2.27-r4:2 USE="ssl -debug -doc -ldap (-selinux) -static -suexec -threads" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias -asis -auth_digest -authn_dbd -cern_meta -charset_lite -dbd -dumpio -ident -imagemap -log_forensic -proxy -proxy_ajp -proxy_balancer -proxy_connect -proxy_ftp -proxy_http -proxy_scgi -reqtimeout -substitute -version" APACHE2_MPMS="-event -itk -peruser -prefork -worker" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB

* IMPORTANT: 5 news items need reading for repository 'gentoo'.
* Use eselect news to read news items.

From the output of "emerge -pv apache", the "-auth_digest" means the auth_digest is not enable.

So a way to enable it is,

in /etc/portage/make.conf, add

APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias auth_digest"

Lets check again.

[Check 1]

localhost ~ # emerge --ask apache

* IMPORTANT: 5 news items need reading for repository 'gentoo'.

* Use eselect news to read news items.

These are the packages that would be merged, in order:

Calculating dependencies... done!

[ebuild R ] www-servers/apache-2.2.27-r4 APACHE2_MODULES="auth_digest*"

[Check 2]

localhost ~ # emerge -pv apache

These are the packages that would be merged, in order:

Calculating dependencies... done!

[ebuild R ] www-servers/apache-2.2.27-r4:2 USE="ssl -debug -doc -ldap (-selinux) -static -suexec -threads" APACHE2_MODULES="actions alias auth_basic auth_digest* authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias -asis -authn_dbd -cern_meta -charset_lite -dbd -dumpio -ident -imagemap -log_forensic -proxy -proxy_ajp -proxy_balancer -proxy_connect -proxy_ftp -proxy_http -proxy_scgi -reqtimeout -substitute -version" APACHE2_MPMS="-event -itk -peruser -prefork -worker" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB

* IMPORTANT: 5 news items need reading for repository 'gentoo'.

* Use eselect news to read news items.

Lets run "emerge --ask apache" again, and the result is like

localhost ~ # ls /usr/lib/apache2/modules/

libphp5.so mod_authn_anon.so mod_authz_groupfile.so mod_cgi.so mod_dir.so mod_filter.so mod_mem_cache.so mod_speling.so mod_vhost_alias.so

mod_actions.so mod_authn_dbm.so mod_authz_host.so mod_cgid.so mod_disk_cache.so mod_headers.so mod_mime.so mod_ssl.so

mod_alias.so mod_authn_default.so mod_authz_owner.so mod_dav.so mod_env.so mod_include.so mod_mime_magic.so mod_status.so

mod_auth_basic.so mod_authn_file.so mod_authz_user.so mod_dav_fs.so mod_expires.so mod_info.so mod_negotiation.so mod_unique_id.so

mod_auth_digest.so mod_authz_dbm.so mod_autoindex.so mod_dav_lock.so mod_ext_filter.so mod_log_config.so mod_rewrite.so mod_userdir.so

mod_authn_alias.so mod_authz_default.so mod_cache.so mod_deflate.so mod_file_cache.so mod_logio.so mod_setenvif.so mod_usertrack.so

So there is mod_auth_basic.so built.

But this is not enough.

in /etc/conf.d/apache2, add

...

APACHE2_OPTS="-D DEFAULT_VHOST -D INFO -D SSL -D SSL_DEFAULT_VHOST -D LANGUAGE -D AUTH_DIGEST"

...

This setting will affect /etc/apache2/httpd.conf to load mod_auth_digest.so

in /etc/apache2/httpd.conf

...

LoadModule auth_digest_module modules/mod_auth_digest.so

...

Install Gentoo in VM.

2014-09-20T23:01:00.002+08:00

Write down my experience to install gentoo in vm.

1.
Boot from install-x86-minimal-20140902.iso

2.
mount /dev/sda1 /mnt/gentoo

3.
links http://www.gentoo.org/main/en/mirrors.xml

4.
mount -t proc proc /mnt/gentoo/proc
mount --rbind /dev /mnt/gentoo/dev
mount --rbind /sys /mnt/gentoo/sys
cp -L /etc/resolv.conf /mnt/gentoo/etc/
chroot /mnt/gentoo /bin/bash
source /etc/profile

5.
emerge gentoo-sources

6.
cd /usr/src/linux
make menuconfig
make -j2

7.
cp arch/x86/boot/bzImage /boot/kernel-$(uname -r)

8.
make modules_install

9.
emerge genkernel
genkernel --install --no-ramdisk-modules initramfs
(It will create initramfs-genkernel-x86-3.14.16-gentoo in /boot/.)

10.
cat /etc/fstab
/dev/sda1 / ext4 noatime 0 1

11.
change root password

12
emerge grub

13.
livecd ~ # grub2-install /dev/sda
Installation finished. No error reported.

livecd ~ # grub2-mkconfig -o /boot/grub/grub.cfg
Generating grub.cfg ...
Found linux image: /boot/kernel-3.14.16-gentoo
Found initrd image: /boot/initramfs-genkernel-x86-3.14.16-gentoo
done

14.
emerge dhcpcd

echo "modules = "dhcpcd"" > /etc/conf.d/net
echo "config_enp2s1="dhcp" >> /etc/conf.d/net

Problem:
scripts/mod/empty.c:1:0: error: CPU you selected does not support x86-64 instruction set

Solution:
When make menuconfig, make sure un-check 64-bit kernel.
[ ] 64-bit kernel

Problem:
/usr/bin/xz: /var/tmp/genkernel/initramfs-3.14.16-gentoo: Cannot allocate memory
ERROR: Compression (/usr/bin/xz -e --check=none -z -f -9) failed

Solution:
Increase memory for the VM. In my case, to 1GB.

Problem:
Could not find the root block device in UUID=XXX

Solution:
livecd ~# lspci
SCSI storage controller: LSI Logic / Symbios Logic 53c1030 PCI-X Fusion-MPT Dual Ultra320 SCSI (rev 01)
Ethernet controller: Advanced Micro Devices, Inc. [AMD] 79c970 [PCnet32 LANCE] (rev 10)

When make menuconfig, make sure

Device Drivers --->
SCSI device support --->
[*] SCSI low-level drivers --->
<*> BusLogic SCSI support
[*] Fusion MPT device support --->
<*> Fusion MPT ScsiHost drivers for SPI
<*> Fusion MPT ScsiHost drivers for FC
<*> Fusion MPT ScsiHost drivers for SAS
<*> Fusion MPT misc device (ioctl) driver

[*] Network device support --->
[*] Ethernet driver support --->
<*> AMD PCnet32 PCI support

Reference:
http://www.gentoo.org/doc/en/gentoo-x86-quickinstall.xml
http://www.360doc.com/content/13/1030/15/1956846_325320292.shtml

dns server in ubuntu

2014-08-31T22:03:00.003+08:00

I need a simple DNS server to work around my experiment. Here is my steps to build a dns server in ubuntu.

1. apt-get install bind9

2. update /etc/bind/named.conf.options
forwarders {
8.8.8.8;
};

dnssec-enable no;
//dnssec-validation auto;

// listen-on-v6 { any; };

3. /etc/init.d/bind9 restart

When encounter the error like,
named[4597]: error (network unreachable) resolving './NS/IN': 2001:dc3::35#53
It seems like the ipv6 address cannot be reachable, so just disable ipv6 setting.

named[4597]: error (no valid RRSIG) resolving 'gov/DS/IN': 192.203.230.10#53
disable dnssec to workaround this error.

Reference:
http://ubuntuforums.org/showthread.php?t=1984950

apt command list

2014-08-17T10:11:00.001+08:00

I used apt command very extensively.

# it is like sync the database

apt-get update

# it is like do the whole system upgrade

apt-get dist-upgrade

# search the database with the keyword

apt-cache search keyword

# show the keyword status, like version, description

apt-cache show keyword

# install the keyword

apt-get install keyword

# list the related file system path with the keyword.

dpkg -L keyword

DHCP daemon in ubuntu

2014-08-17T10:07:00.000+08:00

1. bind a static ip for the interface, for example eth1
in /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#allow-hotplug eth0
auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet static
address 169.254.1.2
netmask 255.255.255.0

2. install isc-dhcp-server

apt-get install isc-dhcp-server

3. in /etc/default/isc-dhcp-server

INTERFACES="eth1"

4. in /etc/dhcp/dhcpd.conf

subnet 169.254.1.0 netmask 255.255.255.0 {

range 169.254.1.3 169.254.1.254;
option routers 169.254.1.2;
option domain-name-servers 169.254.1.2;

}

or

subnet 169.254.1.0 netmask 255.255.255.0 {

range 169.254.1.1 169.254.1.254;
option routers 169.254.1.120;
option domain-name-servers 169.254.1.120;

}

5. restart the service by the following steps

ifdown eth1

ifup eth1

killall dhclient

6. if the steps cannot work, just reboot.

Reference:

http://askubuntu.com/questions/4826/switching-a-server-to-static-ip-from-dhcp

DHCP Client in ubuntu

2014-07-03T07:06:00.000+08:00

In ubuntu, how to release/renew DHCP IP.

Release DHCP IP
$dhclient -r eth0

Renew DHCP IP
$dhclient eth0

The iBooks Library location

2014-07-03T07:05:00.000+08:00

The iBooks Library location

For Mavericks,
/Users/__YOUR_ACCOUNT__/Library/Containers/com.apple.BKAgentService/Data/Documents/iBooks/Books

my snmpd experience

2014-06-01T08:09:00.001+08:00

in ubuntu, setup a snmpd

Take net-snmp 5.4.3 for example

Modify /etc/conf/snmpd.conf

# make snmpd to listen IPv4:161 and IPv6:161
agentAddress udp:161,udp6:[::1]:161

# systemonly is the default setting
# add a new view name, for example 'system'
view systemonly included .1.3.6.1.2.1.1
view systemonly included .1.3.6.1.2.1.25.1
view system included .1

# rocommunity COMMUNITY [SOURCE [OID | -V VIEW [CONTEXT]]]
rocommunity public default -V systemonly
rocommunity localAccess default -V system

Reference
http://www.net-snmp.org/docs/man/snmpd.conf.html

My dhcpd setting

2014-04-27T07:48:00.000+08:00

Sometimes I need to be a dhcp server to provide the ip, so my setting is listed below,

1. use isc-dhcp-server as the dhcp server.

2. set the dhpc server ip as 192.168.1.1

3. in /etc/default/isc-dhcp-server
INTERFACES="eth0"

4. in /etc/dhcp/dhcpd.conf
default-lease-time 60000;
max-lease-time 72000;
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.2 192.168.1.200;
option routers 192.168.1.1;
}

5. restart the service

/etc/init.d/isc-dhcp-server restart