Linux Development – Page 20

HL Twitter手动调整显示时间

因为主页上面HL Twitter显示时间经常不准
显示Thread时间都会差8个小时

这是我的SP和我本地北京时间的差距,
不管他,就手动去调了一下时针

Editing hl-twitter/hl_twitter.php (active)
add following line at the beginning, following “<?php” tag:

date_default_timezone_set('America/Los_Angeles');

1	date_default_timezone_set('America/Los_Angeles');

把HL要用的时区往前拨了8个钟..不管他…我只要CST访问看着正常就好了
至于到了夏令时,估计也没问题…再改呗

VM: Raising runtime error ‘HostMemoryLow’

今天准备把本地的VirtualBox从3.2升级到4

因为官网F11没有对应VBox4的rpm，所以只能用General Binary来安装
原来的OEL5 Unbreakable镜像拿过来还是有问题的，除了之前的IOAPIC，还有USB禁用
不断地出现有Vos Paused很麻烦，提示Memory过低。
问题应当是给Vos分配了过高的内存，可是我之前3.2版本的没问题..

[Solution/Wr]:
调低Virtual OS分配的内存，具体调多低。。多试几次一直到Error不再发生即可

00:05:48.414 GMM: Statistics:
00:05:48.414      Allocated pages: 1d9d1
00:05:48.414      Maximum   pages: 3d79e
00:05:48.414      Ballooned pages: 0
00:05:48.415
VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)
00:05:48.415
Changing the VM state from 'RUNNING' to 'SUSPENDING'.
00:05:48.741
Changing the VM state from 'SUSPENDING' to 'SUSPENDED'.
00:05:48.742
Console: VM runtime error: fatal=false, errorID=HostMemoryLow
message="Unable to allocate and lock memory.
The virtual machine will be paused.
Please close applications to free up memory or close the VM"

00:05:48.414 GMM: Statistics:

00:05:48.414 Allocated pages: 1d9d1

00:05:48.414 Maximum pages: 3d79e

00:05:48.414 Ballooned pages: 0

00:05:48.415

VM: Raising runtime error 'HostMemoryLow' (fFlags=0x2)

00:05:48.415

Changing the VM state from 'RUNNING' to 'SUSPENDING'.

00:05:48.741

Changing the VM state from 'SUSPENDING' to 'SUSPENDED'.

00:05:48.742

Console: VM runtime error: fatal=false, errorID=HostMemoryLow

message="Unable to allocate and lock memory.

The virtual machine will be paused.

Please close applications to free up memory or close the VM"

sdf

New update: Fri Dec 24 17:54:15 CST 2010
放弃更新至VBox4.0，回到VBox3.2

error: invalid Python installation: unable to open /usr/lib/python2.6/config/Makefile (No such file or directory)

Updating VirtualBox on Fedora.11
Fetch from VBox Download page,
VirtualBox-4.0.0-69151-Linux_x86.run

[root@suse-pc tmp]# sh ./*run
Verifying archive integrity... All good.
Uncompressing VirtualBox for Linux installation..........
VirtualBox Version 4.0.0r69151(2010-12-22T14:24:16Z) installer
Installing VirtualBox to /opt/VirtualBox
Python found: python, installing bindings...
error: invalid Python installation: unable to open
 /usr/lib/python2.6/config/Makefile (No such file or directory)
Building the VirtualBox kernel modules

VirtualBox has been installed successfully.

You will find useful information about using VirtualBox
in the user manual
  /opt/VirtualBox/UserManual.pdf
and in the user FAQ
  http://www.virtualbox.org/wiki/User_FAQ

We hope that you enjoy using VirtualBox.

[root@suse-pc tmp]# sh ./*run

Verifying archive integrity... All good.

Uncompressing VirtualBox for Linux installation..........

VirtualBox Version 4.0.0r69151(2010-12-22T14:24:16Z) installer

Installing VirtualBox to /opt/VirtualBox

Python found: python, installing bindings...

error: invalid Python installation: unable to open

/usr/lib/python2.6/config/Makefile (No such file or directory)

Building the VirtualBox kernel modules

VirtualBox has been installed successfully.

You will find useful information about using VirtualBox

in the user manual

/opt/VirtualBox/UserManual.pdf

and in the user FAQ

http://www.virtualbox.org/wiki/User_FAQ

We hope that you enjoy using VirtualBox.

Error about python installation,
fix:

yum install python-devel

1	yum install python-devel

tar: Removing leading `/’ from member names

最近一直不在意一处WARNING,到是仔细看了才觉得应该记下来。
当tar选択绝对路径(Absolute Path)而非相对路径(Relative Path)时候，
tar会报WARNING,默认去除root符号

这算是一种安全策略吧，Linux有时候设计就是这样，可以理解，但比较生硬
因为tar有时候只是为了备份还原，有时候只是简单的打包。
这种默认的设置还真有点意思

[root@vm user]# tar -cjvf /tmp/atest.tar.gz /tmp/libs.pm
tar: Removing leading `/' from member names
/tmp/libs.pm

[root@vm user]# tar -cjvf /tmp/atest.tar.gz /tmp/libs.pm

tar: Removing leading `/' from member names

/tmp/libs.pm

如果想保留/记号的话，比如tar备份 /etc/grub.conf，那么在解包时候
无论tar包位置如何，都会解压覆盖原/etc/grub.conf

-P, --absolute-names       
     don't strip leading `/'s from file names

1 2	-P, --absolute-names don't strip leading `/'s from file names

VirtualBox hit warning on `calibrate_APIC_clock`

Environment:
Host: Fedora 11. XFCE 2.6.30.10-105.2.23.fc11.i586
Vb Version: VirtualBox 3.2.12
Guest: Oracle OEL5.5 2.6.18-194.26.1.0.1.el5

Hit problem:(refer to bug562006)

WARNING calibrate_APIC_clock: the APIC timer calibration may be wrong

fix/workaround:

add follow postfix to grub boot option:

devider=10

1	devider=10

update: Thu Dec 16 17:26:41 CST 2010
Description : the above mentioned workaround seems cannt workaround,
fix applied from bug562006 has provided,
but I checked the changelog of kernel, which already merged this fix:

* Mon Feb 15 2010 Jarod Wilson <jarod@redhat.com> [2.6.18-188.el5]
– [misc] fix APIC and TSC reads for guests (Prarit Bhargava) [562006]

to find a new w/k
update: Fri Dec 17 14:17:07 CST 2010
Still doesnt work when re-build a kernel which has merged the fix.562006.
giveup and ingore the warning.

——————Sceenshot Before fix——————

——————Sceenshot after fix applied———–