HBSpy's Hexo

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Can’t locate ExtUtils/MakeMaker.pm

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yum install perl-ExtUtils-CBuilder perl-ExtUtils-MakeMaker

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CentOS 升级 gcc 和 g++ 的方法

  1. 使用 redhat developer toolset 1.1 的repo，安装GCC
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cd /etc/yum.repos.d
wget http://people.centos.org/tru/devtools-1.1/devtools-1.1.repo 
yum --enablerepo=testing-1.1-devtools-6 install devtoolset-1.1-gcc devtoolset-1.1-gcc-c++
  1. 替换系统中原来的GCC
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ln -s /opt/centos/devtoolset-1.1/root/usr/bin/* /usr/local/bin/
hash -r

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命令或脚本

  1. extTable .1.3.6.1.4.1.2021.8
    只可以SNMP查询出单行（首行）返回结果

  2. exec/extend 指定MIBOID
    可以SNMP查询出多行(全部）返回结果)

exec无效

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# Extensible sections.
# 

# This alleviates the multiple line output problem found in the
# previous executable mib by placing each mib in its own mib table:

# Run a shell script containing:
#
# #!/bin/sh
# echo hello world
# echo hi there
# exit 35
#
# Note:  this has been specifically commented out to prevent
# accidental security holes due to someone else on your system writing
# a /tmp/shtest before you do.  Uncomment to use it.
#
# exec .1.3.6.1.4.1.2021.50 shelltest /bin/sh /tmp/shtest

# % snmpwalk -v 1 localhost -c public .1.3.6.1.4.1.2021.50
# enterprises.ucdavis.50.1.1 = 1
# enterprises.ucdavis.50.2.1 = "shelltest"
# enterprises.ucdavis.50.3.1 = "/bin/sh /tmp/shtest"
# enterprises.ucdavis.50.100.1 = 35
# enterprises.ucdavis.50.101.1 = "hello world."
# enterprises.ucdavis.50.101.2 = "hi there."
# enterprises.ucdavis.50.102.1 = 0

# Now the Output has grown to two lines, and we can see the 'hi
# there.' output as the second line from our shell script.
#
# Note that you must alter the mib.txt file to be correct if you want
# the .50.* outputs above to change to reasonable text descriptions.

# Other ideas:
# 
# exec .1.3.6.1.4.1.2021.51 ps /bin/ps 
# exec .1.3.6.1.4.1.2021.52 top /usr/local/bin/top
# exec .1.3.6.1.4.1.2021.53 mailq /usr/bin/mailq

snmpd -v 5.5以上使用extend

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extend .1.3.6.1.4.1.2021.51 ps /bin/ps

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python 升级引起的版本不兼容

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There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named yum

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.7.12 (default, Aug 17 2016, 09:41:51)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]

If you cannot solve this problem yourself, please go to
the yum faq at:
  http://yum.baseurl.org/wiki/Faq

修改执行 yum 的 python 至系统默认版本

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whereis yum
yum: /usr/bin/yum /etc/yum.conf /etc/yum /usr/share/man/man8/yum.8.gz

whereis python
python: /usr/bin/python2.6 /usr/bin/python /usr/bin/python2.7

vim /usr/bin/yum
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#!/usr/bin/python 	// 修改为原系统自带的python: #!/usr/bin/python2.6
import sys
try:
    import yum
except ImportError:
    print >> sys.stderr, ""\"
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