iOS客户端

December 18th, 2011 生活随想 No comments | 17 views

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iOS客户端

Linux的运行级别

November 13th, 2011 Linux(Server) No comments | 23 views

运行级别Runlevel)指的是Unix或者Linux等类Unix操作系统下不同的运行模式。运行级别通常分为7等,分别是从0到6,但如果必要的话也可以更多。

例如在大多数linux操作系统下一共有如下6个典型的运行级别:

具体可参照 /etc/inittab
#   0 – halt (Do NOT set initdefault to this) //停机
#   1 – Single user mode //单用户
#   2 – Multiuser, without NFS (The same as 3, if you do not have networking) //多用户,无网络连接
#   3 – Full multiuser mode //多用户,启用网络连接
#   4 – unused //用户自定义
#   5 – X11 //带图形界面的多用户
#   6 – reboot (Do NOT set initdefault to this) //重启

id:3:initdefault //代表默认的运行级别为3

可以用下面两个命令查看当前的运行级别:

[root@Daruizi ~]# runlevel
N 3
[root@Daruizi ~]# who -r
         run-level 3  2011-11-14 02:24

man 命令 详解

November 13th, 2011 Linux(Server) No comments | 7 views

[root@Daruizi ~]# man date

DATE(1)                          User Commands                         DATE(1)

NAME
       date – print or set the system date and time

SYNOPSIS
       date [OPTION]… [+FORMAT]
       date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]

DESCRIPTION
       Display the current time in the given FORMAT, or set the system date.

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