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debian(wheezy)安装mysql的时候报错There's not enough sp

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Release: 2016-06-07 15:40:34
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新机器,安装#apt-get install mysql-server提示需要安装mysql-server-5.5 等其它几个。 于是跟上。 到了安装的时候提示错误。 Setting up mysql-common (5.5.33+dfsg-0+wheezy1) ...(Reading database ... 180252 files and directories currently installe

新机器,安装#apt-get install mysql-server提示需要安装mysql-server-5.5 等其它几个。 于是跟上。 到了安装的时候提示错误。

Setting up mysql-common (5.5.33+dfsg-0+wheezy1) ...
(Reading database ... 180252 files and directories currently installed.)
Unpacking mysql-server-5.5 (from .../mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb) ...
ERROR: There's not enough space in /var/lib/mysql/
dpkg: error processing /var/cache/apt/archives/mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1
Selecting previously unselected package mysql-server.
Unpacking mysql-server (from .../mysql-server_5.5.33+dfsg-0+wheezy1_all.deb) ...
Errors were encountered while processing:
 /var/cache/apt/archives/mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
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这里我们分析下问题。apt-get install 调用的dpkg, 然后dpkg  去调的

/var/cache/apt/archives/mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb
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 把apt的cache的这个文件复制出来

#cp /var/cache/apt/archives/mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb /home/bak

然后我们去看看打包的文件里面是怎么判断的。执行下面的shell,我们把这个包解压出来。

#cd /home/bak && make tmp
#mkdir tmp
#dpkg-deb -x mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb tmp
#dpkg-deb --control mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb.deb tmp/DEBIAN
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然后

#cd tmp/DEBIAN

找到了一个预安装文件叫preinst,用编辑器打开。在149行找到这句话

# checking disc space
if LC_ALL=C BLOCKSIZE= df --portability $DATADIR/. | tail -n 1 | awk '{ exit ($4>1000) }'; then
  echo "ERROR: There's not enough space in $4 and $DATADIR/" 1>&2
  db_stop
  exit 1
fi
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这里是个判断,就是刚才我们安装的时候报的错

ERROR: There's not enough space in /var/lib/mysql/
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现在我们把这个提取出来稍加修改在终端运行一下
#df --portability $DATADIR/. | tail -n 1 | awk '{ print $4 }'
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显示是空, 所以进来提示, 空间不足。

我们继续把这个preinst改下,或者是修改下判断 比如从$5来判断 或者直接反起来, 把$4>1000 改成$4

然后重新打包 

#dpkg -b tmpmysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb

接下来复制回去mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb

#cp mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb/var/cache/apt/archives/mysql-server-5.5_5.5.33+dfsg-0+wheezy1_amd64.deb

#yes

继续重新安装发现通过了安装。没有再提示空间不足。

但是问题的根源不在mysql的预安装文件上, 而是在我们自身的系统环境上。

通过排查,发现系统已经安装了一些会影响系统命令输出的程序。

找到你的.bashrc 看看是不是装了一些终端显色的软件。比如cw 它会影响到这个的输出。注释掉这个再运行下刚才修改的语句,就可以看见区别了。

会显示几百万甚至几千万,在preinst这里就会跳过而不报错了。


比如cw 终端显色,正是这个软件导致了系统命令的输出出现了错行。所以,只需要暂时注销掉在.bashrc里面的cw就可以了



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