文件描述符:文件描述符是一个小的非负整数,是内核用来标识特定进程正在访问的文件标准输入/输出/出错:shell为每个程序打开了三个文件描述符,STDIN_FILEON,STDOUT_FILEON,STDERR_FILEON,默认这三个文件描述符都链向终端不带缓冲的IO:函数open
read wri...
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其他好文 时间:
2014-05-07 17:13:03
阅读次数:
284
Check nagios配置文件报错如下:[nagios@2 etc]$ /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg Nagios Core 4.0.6Copyright (c) 2009-present Nagios Core Development Team and Community Contributor...
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移动开发 时间:
2014-05-07 15:47:14
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449
Failed to open a session for the virtual machine winxp.
The virtual machine 'winxp' has terminated unexpectedly during startup with exit code 1.
Result Code: NS_ERROR_FAILURE (0x80004005)
Compo...
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其他好文 时间:
2014-05-07 12:33:48
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317
Chef had an interesting dream last night. He dreamed of a new revolutionary chicken recipe. When he woke up today he tried very hard to reconstruct the ingredient list. But, he could only remember cer...
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其他好文 时间:
2014-05-07 11:23:54
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330
不小心重命名了libc.so.6动态库,运行命令
#mv /lib/libc.so.6 /lib/libc.so.6.back
#ls
ls: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
各种命令都不好...
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其他好文 时间:
2014-05-07 04:49:53
阅读次数:
319
I make a connection through SSH and then I type:
# x0vncserver --PasswordFile=/home/hello/.vnc/passwd
x0vncserver: unable to open display ""
~ImageCleanup called
the reason is :
...
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其他好文 时间:
2014-05-07 04:23:43
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581
题目:
A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.
Return a deep copy of the list.
思路:
主要是深层复制的问题:
本题比较简...
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其他好文 时间:
2014-05-07 02:44:38
阅读次数:
344
之前在查看v$open_cursor的时候,发现很多相同的record。 让我很疑惑, sid
saddr sql_id 都相同,我就想 这不是一个cursor吗? 那为什么在open_cursor中出现多次?
后来通过别人点拨明白了,这应该是一个相同的SQL语句被 session 打开了并运行了很...
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其他好文 时间:
2014-05-07 01:11:25
阅读次数:
403
将文件的每行读取到字典中文件每行内容格式为:cui:123456789f=open(‘user.txt‘)
d=f.readlines()
f.close()
mydict={}
foriind:
user=i.split(‘:‘)[0]
info=i.split(‘:‘)[1].rstrip()
mydict[user]=info
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编程语言 时间:
2014-05-06 16:40:26
阅读次数:
362
chen@chen-pc~/demo/abc/bin$railsc
/home/chen/.rvm/gems/ruby-2.0.0-p451/gems/execjs-2.0.2/lib/execjs/runtimes.rb:51:in`autodetect‘:CouldnotfindaJavaScriptruntime.Seehttps://github.com/sstephenson/execjsforalistofavailableruntimes.(ExecJS::RuntimeUnavailable)..
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编程语言 时间:
2014-05-06 16:13:25
阅读次数:
407