emerge 指定特定版本, 要使用等號(=)

emerge 指定特定版本,要使用等號(=)

Ex.
# emerge =gcc-3.4.6-r2

Gentoo 上的多個版本 gcc

# emerge =gcc-3.4.6-r2
# gcc-config -l
# gcc-config i686-pc-linux-gnu-3.4.6

compiler busybox failed (__NR_clock_gettime)

CC libbb/time.o
libbb/time.c: In function `monotonic_us':
libbb/time.c:20: `__NR_clock_gettime' undeclared (first use in this function)
libbb/time.c:20: (Each undeclared identifier is reported only once
libbb/time.c:20: for each function it appears in.)
libbb/time.c:20: `CLOCK_MONOTONIC' undeclared (first use in this function)
libbb/time.c: In function `monotonic_sec':
libbb/time.c:27: `__NR_clock_gettime' undeclared (first use in this function)
libbb/time.c:27: `CLOCK_MONOTONIC' undeclared (first use in this function)
make[1]: *** [libbb/time.o] Error 1


Root cause: uclibc is too old

compiler busybox

1. download busybox
# http://www.busybox.net/downloads/busybox-1.10.1.tar.bz2

2. uncompress
# tar -jxvf busybox-1.10.1.tar.bz2
# cd busybox-1.10.1

3. config
# make menuconfig

4. compiler
# make ARCH=mips CROSS_COMPILE=mipsel-uclibc-

make iproute2 without(disable) ipv6

1. Download source code
# wget http://devresources.linux-foundation.org/dev/iproute2/download/iproute2-2.6.25.tar.bz2

2. Uncompress
# tar -jxvf iproute2-2.6.25.tar.bz2
# cd iproute2-2.6.25

3. Path source code
vi ./iproute2/ip/iptunnel.c
case AF_INET6:
return do_ip6tunnel(argc, argv);
//case AF_INET6:
// return do_ip6tunnel(argc, argv);

vi ./iproute2/ip/Makefile
IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o \
rtm_map.o iptunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o \
ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \
iplink_vlan.o link_veth.o
remove ip6tunnel.o from IPOBJ

4. Done

[Subversion] svn through proxy

http://subversion.tigris.org/faq.html#proxy
What if I'm behind a proxy?

The Subversion client can go through a proxy, if you configure it to do so. First, edit your "servers" configuration file to indicate which proxy to use. The files location depends on your operating system. On Linux or Unix it is located in the directory "~/.subversion". On Windows it is in "%APPDATA%\Subversion". (Try "echo %APPDATA%", note this is a hidden directory.)
There are comments in the file explaining what to do. If you don't have that file, get the latest Subversion client and run any command; this will cause the configuration directory and template files to be created.
Next, you need to make sure the proxy server itself supports all the HTTP methods Subversion uses. Some proxy servers do not support these methods by default: PROPFIND, REPORT, MERGE, MKACTIVITY, CHECKOUT. In general, solving this depends on the particular proxy software. For Squid, the config option is

#  TAG: extension_methods
#       Squid only knows about standardized HTTP request methods.
#       You can add up to 20 additional "extension" methods here.
#
#Default:
# none
extension_methods REPORT MERGE MKACTIVITY CHECKOUT

(Squid 2.4 and later already knows about PROPFIND.)

See also "What are all the HTTP methods Subversion uses?" for advice on additional HTTP methods to allow through your proxy.

If it's difficult or impossible to get the proxy to allow Subversion traffic, but you want to check out the Subversion sources, you may be able to go around the proxy. Some proxies that filter port 80 nevertheless allow anything on port 81. For this reason, the svn.collab.net repository server listens on port 81 as well as on port 80. Try:

   svn checkout http://svn.collab.net:81/repos/svn/trunk subversion

and maybe the proxy will let you through. Another strategy is to attempt the checkout over SSL, which many proxies allow:

   svn checkout https://svn.collab.net/repos/svn/trunk subversion

Of course, your svn client will have to have been built with ssl support; just pass --with-ssl to Subversion's ./configure script. You can check to see whether the 'https' scheme is supported by running svn --version.

Example : Edit the 'servers' file and add something like :

[global]
http-proxy-host = your.proxy.name
http-proxy-port = 3128
http-proxy-username = username
http-proxy-password = password

[Gentoo] emerge 指定版本

# emerge -pv =automake-1.4_p6
# emerge =automake-1.4_p6

[Linux] warning: Clock skew detected. Your build may be incomplete.

Symptom:
warning: Clock skew detected. Your build may be incomplete.

Solution:
# find . -print | xargs touch

[FC8] Libvirt / virbr0

1. What is Libvirt
http://libvirt.org/

Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurently on a single hardware system where the basic resources are driven by a Linux (or Solaris) instance. The library aims at providing a long term stable C API initially for Xen paravirtualization but it can also integrate with other virtualization mechanisms. It currently also supports QEMU, KVM and OpenVZ.

2. Related blog
http://www.mw.net.tw/user/lindahu/blog/2007/07/18/1502/61823/

3. Remove it
[root@nas ~]# yum remove python-virtinst libvirt-python libvirt

[FC8] IPv6

1. 先檢查系統上的 IPv6 有沒有啟用
[root@nas ~]# ifconfig|grep inet6
inet6 addr: fe80::201:6cff:fe20:d469/64 Scope:Link
inet6 addr: ::1/128 Scope:Host
inet6 addr: fe80::2ff:fff:fe11:faca/64 Scope:Link
inet6 addr: fe80::4470:c8ff:fe16:7189/64 Scope:Link

2. 檢查 IPv6 模組是否被載入
[root@nas ~]# lsmod|grep -i ipv6
ipv6 228357 20

3. 關閉 IPv6
[root@nas ~]# vi /etc/modprobe.conf
alias net-pf-10 off
alias ipv6 off

4. 重新啟動

[Linux] Mirror sites

http://ftp.twaren.net/

[FC8] yum

[root@nas ~]# rpm -ivh http://rpm.livna.org/livna-release-8.rpm

[root@nas ~]# rpm -qa|grep -i yum
yum-metadata-parser-1.1.2-1.fc8
yum-kernel-module-1.1.11-1.fc8
yum-3.2.8-2.fc8

[root@nas ~]# rpm -qa|grep -i livna
livna-release-8-1

[root@nas ~]# rpm -ql livna-release
/etc/yum.repos.d/livna-devel.repo
/etc/yum.repos.d/livna-testing.repo
/etc/yum.repos.d/livna.repo

[root@nas ~]# cat /etc/yum.repos.d/fedora.repo
[fedora]
name=Fedora $releasever - $basearch
baseurl=http://ftp.twaren.net/Linux/Fedora/linux/releases/8/Everything/i386/os/

[root@nas ~]# cat /etc/yum.repos.d/fedora-updates.repo
[updates]
name=Fedora $releasever - $basearch - Updates
baseurl=http://ftp.twaren.net/Linux/Fedora/linux/updates/8/i386/

[root@nas ~]# cat /etc/yum.conf
[main]
cachedir=/var/cache/yum
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
metadata_expire=1800
installonly_limit=2

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
proxy=http://gentoo.linuxhall.tw:3128/
proxy_username=username
proxy_password=password