Linux入门命令

#表示是root 的shell.$表示一般用户的shell

1.man 对你熟悉或不熟悉的命令提供帮助解释
eg:man ls 就可以查看ls相关的用法
注：按q键或者ctrl+c退出,在linux下可以使用ctrl+c终止当前程序运行

2.ls 查看目录或者文件的属性,列举出任一目录下面的文件
eg: ls /usr/man
ls -l
a.d表示目录(directory),如果是一个”-“表示是文件,如果是l则表示是一个连接文件(link)
b.表示文件或者目录许可权限.分别用可读(r),可写(w),可运行(x).

3.cp 拷贝文件
eg: cp filename1 filename2 //把filename1拷贝成filename2
cp 1.c netseek/2.c //将1.c拷到netseek目录下命名为2.c

4.rm 删除文件和目录
eg: rm 1.c //将1.c这个文件删除

5.mv 移走目录或者改文件名
eg: mv filename1 filename2 //将filename1 改名为filename2
mv qib.tgz ../qib.tgz //移到上一级目录

6.cd 改变当前目录 pwd 查看当前所在目录完整路径
eg: pwd //查看当前所在目录路径
cd netseek //进入netseek这个目录
cd //退出当前目录
7.cat,more命令
将某个文件的内容显示出来.两个命令所不同的是:cat把文件内容一直打印出来,而 more则分屏显示
eg; cat>1.c //就可以把代码粘帖到1.c文件里，按ctrl+d 保存代码。
cat 1.c 或more 1.c //都可以查看里面的内容。
gcc -o 1 1.c //将1.c编译成.exe文件，我们可以用此命编译出代码


8.chmod 命令 权限修改 用法：chmod 一位8进制数 filename
eg: chmod u+x filenmame //只想给自己运行，别人只能读
//u表示文件主人, g 表示文件文件所在组. o 表示其他人 ;r 表可读,w 表可写,x 表可以运行
chmod g+x filename //同组的人来执行

9. clear,date命令 clear:清屏,相当与DOS下的cls;date:显示当前时间.

10.mount 加载一个硬件设备
用法:mount [参数] 要加载的设备 载入点
eg: mount /dev/cdrom
cd /mnt/cdrom //进入光盘目录

11.su 在不退出登陆的情况下,切换到另外一个人的身份
用法: su -l 用户名(如果用户名缺省,则切换到root状态)
eg:su -l netseek (切换到netseek这个用户，将提示输入密码)

12.whoami,whereis,which,id
//whoami:确认自己身份.
//whereis:查询命令所在目录以及帮助文档所在目录.
//which:查询该命令所在目录(类似whereis)
//id:打印出自己的UID以及GID.(UID:用户身份唯一标识.GID:用户组身份唯一标识.每一个用户只能有一个唯一的UID和GID.)
eg: whoami //显示你自已登陆的用户名
whereis bin 显示bin所在的目录, 将显示为：/usr/local/bin
which bin

13. grep,find grep:文本内容搜索;find:文件或者目录名以及权限属主等匹配搜索
eg: grep success * 　　/*查找当前目录下面所有文件里面含有success字符的文件

14.kill 可以杀死某个正在进行或者已经是dest状态的进程
eg; ps ax

15.passwd 可以设置口令

16.history 用户用过的命令
eg: history //可以显示用户过去使用的命令

17.!! 执行最近一次的命令

18.mkdir命令
eg: mkdir netseek //创建netseek这个目录

19.tar 解压命令
eg: tar -zxvf nmap-3.45.tgz //将这个解压到nmap-3.45这个目录里

20.finger 可以让使用者查询一些其他使用者的资料
eg: finger //查看所用用户的使用资料
finger root //查看root的资料







The Regex Function is used to parse the previous response using any regular expression (provided by user). The function returns the template string with variable values filled in.

The __regexFunction stores values for future use. In the sixth parameter, you can specify a reference name. After this function executes, the same values can be retrieved at later times using the syntax for user-defined values. For instance, if you enter "refName" as the sixth parameter you will be able to use:

${refName} to refer to the computed result of the second parameter ("Template for the replacement string") parsed by this function

${refName_g0} to refer to the entire match parsed by this function.

${refName_g1} to refer to the first group parsed by this function.

${refName_g#} to refer to the n th group parsed by this function.

${refName_matchNr} to refer to the number of groups found by this function.

Parameters

Attribute

Description

Required

First argument

The first argument is the regular expression to be applied to the response data. It will grab all matches. Any parts of this expression that you wish to use in your template string, be sure to surround in parentheses. Example: . This will grab the value of the link and store it as the first group (there is only 1 group). Another example: . This will grab the name as the first group, and the value as the second group. These values can be used in your template string

Yes

Second argument

This is the template string that will replace the function at run-time. To refer to a group captured in the regular expression, use the syntax: $[group_number]$. Ie: $1$, or $2$. Your template can be any string.

Yes

Third argument

The third argument tells JMeter which match to use. Your regular expression might find numerous matches. You have four choices:

An integer - Tells JMeter to use that match. '1' for the first found match, '2' for the second, and so on

RAND - Tells JMeter to choose a match at random.

ALL - Tells JMeter to use all matches, and create a template string for each one and then append them all together. This option is little used.

A float number between 0 and 1 - tells JMeter to find the Xth match using the formula: (number_of_matches_found * float_number) rounded to nearest integer.

Yes

Fourth argument

If 'ALL' was selected for the above argument value, then this argument will be inserted between each appended copy of the template value.

No

Fifth argument

Default value returned if no match is found

No

Sixth argument

A reference name for reusing the values parsed by this function. Stored values are ${refName} (the replacement template string) and ${refName_g#} where "#" is the group number from the regular expression ("0" can be used to refer to the entire match).

No