linux下的asm目录，asm代表什么意思

asm是assembly language 的简称，即：汇编语言。asm是一个符号连接，只有在你的主makefile的ARCH 变量赋值，并且编译过一遍内核之后才会指向对应的体系结构，这个文件夹下的东西是体系结构相关的。如：make的时候 /include/asm 指向 /include/asm-x86/

oracle 10R2推出了asmcmd这个工具，可以用来管理asm存储上的文件。

1.使用asmcmd命令必须先启动asm实例，不然会有以下报错：rac2->asmcmd -p

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist

Linux Error: 2: No such file or directory (DBD ERROR: OCISessionBegin)2.使用asmcmd必须先指定ORACLE_HOME和ORACLE_SID，注意此处ORACLE_SID是asm的sid，不然会报错：rac2->asmcmd -p

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist

Linux Error: 2: No such file or directory (DBD ERROR: OCISessionBegin)3.asmcmd命令带p参数和不带p参数的作用：

带p，使用asmcmd将显示当前路径：rac2->asmcmd -p

ASMCMD [+] >ls

DG1/

RECOVERDEST/

ASMCMD [+] >cd DG1

ASMCMD [+DG1] >ls

DEVDB/

ASMCMD [+DG1] >cd DEVDB

ASMCMD [+DG1/DEVDB] >不带p，不显示当前路径：rac2->asmcmd

ASMCMD>ls

DG1/

RECOVERDEST/

ASMCMD>cd DG1

ASMCMD>ls

DEVDB/

ASMCMD>cd DEVDB

ASMCMD>4.其他相关参数，可使用help查看ASMCMD [+] >help

asmcmd [-p] [command]

The environment variables ORACLE_HOME and ORACLE_SID determine the

instance to which the program connects, and ASMCMD establishes a

bequeath connection to it, in the same manner as a SQLPLUS / AS

SYSDBA. The user must be a member of the SYSDBA group.

Specifying the -p option allows the current directory to be displayed

in the command prompt, like so:

ASMCMD [+DATAFILE/ORCL/CONTROLFILE] >

[command] specifies one of the following commands, along with its

parameters.

Type "help [command]" to get help on a specific ASMCMD command.

commands:

--------

cd

du

find

help

ls

lsct

lsdg

mkalias

mkdir

pwd

rm

rmalias

Linux *** 作系统下的汇编语言编译连接程序

该程序可以将你所编写的汇编语言转换成机器能识别的机器语言并保存在一个程序文件里

然后你就才可以执行这个你编写的程序

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