hellokaton

每个平台的信号定义或许有些不同。下面列出了POSIX中定义的信号。 Linux 使用34-64信号用作实时系统中。 命令man 7 signal提供了官方的信号介绍。

在POSIX.1-1990标准中定义的信号列表

SingularityMatrix

#
# /etc/nsswitch.conf
#
# An example Name Service Switch config file. This file should be
# sorted with the most-used services at the beginning.
#
# The entry '[NOTFOUND=return]' means that the search for an
# entry should stop if the search in the previous entry turned
# up nothing. Note that if the search failed due to some other reason
# (like no NIS server responding) then the search continues with the

kevinkindom

Python Socket 编程详细介绍

Python 提供了两个基本的 socket 模块：

• Socket 它提供了标准的BSD Socket API。
• SocketServer 它提供了服务器重心，可以简化网络服务器的开发。

下面讲解下 Socket模块功能。

Socket 类型

tonyc

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)