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How to resize LVM on Centos7/Ubuntu14.04 ?

After install Centos7, found disk size less, so I need resize the disk, you can use some tools to achieve the function, e.g: GParted or disk-genius. But if your Server disk format is LVM, you can easy to manual adjust that. I don’t know how to resize LVM by Gparted or disk-genius. For this article, will discuss how to adjust Centos7/Ubuntu14.04 by LVM. That should same action/command in Centos and Ubuntu.

If you want to check steps in Ubuntu, can check this attachment: lvm-resize-ubuntu14.04

1. Follow disk info

Check system contents by “sudo df -H”, check all disk status by “sudo fdisk -l”.

[root@frank ~]# df -H
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/myvg-root  7.4G  7.4G  4.0M 100% /
devtmpfs               2.1G     0  2.1G   0% /dev
tmpfs                  2.1G  250k  2.1G   1% /dev/shm
tmpfs                  2.1G  9.5M  2.1G   1% /run
tmpfs                  2.1G     0  2.1G   0% /sys/fs/cgroup
/dev/mapper/myvg-home  731M  140M  591M  20% /home
/dev/sda1              521M  126M  396M  25% /boot
/dev/sr0               4.2G  4.2G     0 100% /run/media/root/CentOS 7 x86_64

2. Relationship for VG, PV and LV


Some effective tools tips on Mac platform

Transfer to Mac platform for many years, some effective tools are very useful at normal work. Some tools can transparent to covert to Mac platform, e.g SecureCRT, UltraEdit. But some of better new tools need to be adapted, so I wrote the article and discussed tips of them. That can help some people easy and effective to use the tools. Certainly, please support genuine software 🙂


I like login to linux server by terminal of MacOS, but that tool function very less and couldn’t auto generate logg, so I found another good free tool – Iterm2, that is good terminal console in MacOS. Let me show some tips on Iterm2.

Auto check share memory utilization for IOX by Python


In some scenario, we need to monitor some data in router/switch by automation. This article will show example that how to check share memory utilization. And you can easy to change the script base on your requirement/scenario.


Due to “telnetlib” couldn’t exactly check expect messages by read_until() function (that couldn’t control exactly time when the info return to buffer), so I change to “expect”. And follow Bo’s example Python Expect Demo, and there is a good documents for expect demo from IBM too: 探索 Pexpect,第 2 部分:Pexpect 的实例分析



After installed Centos 6.7 for CISCO WAE, I found python version is 2.6 that is much older, and I need ansible1.9, but Centos default upgrade to ansible2.2… in order to easy management ansible1.9 that is python package, I plan to install PIP. From official website, suggest not use 2.6 under pip, so I need to upgrade python to 2.7 too.

But I found WAE use 2.6 after I succeed upgrade python to 2.7…Summarized the totally steps that will help me review in future.

Upgrade Python

After checked from follow link, python 2.7.9 integrate pip, so install this version 🙂

1. Install some package that require by python

python have multi dependencie

[root@wae ~]# yum install gcc
[root@wae ~]# yum install openssl-devel

2. Install python 2.7.9

[root@wae ~]# wget
[root@wae ~]# mv Python-2.7.9.tgz /opt/
[root@wae ~]# cd /opt/
[root@wae opt]# tar -xvf Python-2.7.9.tgz 
[root@wae opt]# cd Python-2.7.9
[root@wae Python-2.7.9]# ./configure --prefix=/usr/local/python2.7
[root@wae Python-2.7.9]# make
[root@wae Python-2.7.9]# make install


Building Citra in MacOS

Platform: MacBook Pro
Version: 10.12.3
Cpu: Core i7 2.2
Xcode: 8.2.1

1. Based on github release, install all component by brew:

2.Have alarm after cmake:

MacOS:Documents frank$ cd citra/
MacOS:citra frank$
MacOS:citra frank$
MacOS:citra frank$ export Qt5_DIR=$(brew --prefix)/opt/qt5
MacOS:citra frank$ export MACOSX_DEPLOYMENT_TARGET=10.9
MacOS:citra frank$ mkdir build
MacOS:citra frank$ cd build
MacOS:build frank$ cmake .. -GXcode
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:36 (project):
No CMAKE_C_COMPILER could be found.

CMake Error at CMakeLists.txt:36 (project):
No CMAKE_CXX_COMPILER could be found.

-- Configuring incomplete, errors occurred!
See also "/Users/frank/Documents/citra/build/CMakeFiles/CMakeOutput.log".
See also "/Users/frank/Documents/citra/build/CMakeFiles/CMakeError.log".