3com S7906E 安装指导

 

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Repeats a specified character 
group for once. A character 
group refers to the string in () 
before \. index refers to the 
sequence number (starting from 
1 from left to right) of the 
character group before \: if only 
one character group appears 
before \, then index can only be 
1; if n character groups appear 
before index, then index can be 
any integer from 1 to n. 

For example, (string)\1 means to repeat 
string for once, and (string)\1 must 
match a string containing stringstring; 
(string1)(string2)\2 means to repeat 
string2 for once, and (string1)(string2)\2 
must match a string containing 
string1string2string2; 
(string1)(string2)\1\2 means to repeat 
string1 for once first, and then repeat 
string2 for once, and 
(string1)(string2)\1\2 must match a string 
containing string1string2string1string2. 

[^] 

Used to match any character 
not in a specified range. 

For example, [^16A] means to match a 
string containing any character except 1, 
6 or A, and the string can also contain 1, 
6 or A, but cannot contain these three 
characters only. For example, [^16A] 
can match “abc” and “m16”, but not 1, 
16, or 16A. 

\<string 

Used to match a character 
string starting with string. 

For example, “\<do” can match word 
“domain” or string “doa”. 

string\> 

Used to match a character 
string ending with string. 

For example, “do\>” can match word 
“undo” or string “abcdo”. 

\bcharacter2 

Used to match 
character1character2. 
character1 can be any 
character except number, letter 
or underline, and \b equals 
[^A-Za-z0-9_]. 

For example, \ba can match -a, with - 
represents character1, and a represents 
character2; while \ba cannot match “2a” 
or “ba”. 

\Bcharacter 

It must match a string 
containing character, and there 
can no spaces before character.

For example, “\Bt” can match “t” in 
“install”, but not “t” in “big top”. 

Used to match 
character1character2. 
character2 must be a number, 
letter or underline, and \w 
equals [^A-Za-z0-9_]. 

For example, “v\w” can match “vlan”, 
with “v” being character1, and “l” being 
character2. v\w can also match 
“service”, with “i” being character2.  

\W Equals 

\b. 

For example, “\Wa” can match “-a”, with 
“-” representing character1, and “a” 
representing character2; while “\ba” 
cannot match “2a” or “ba”. 

\ 

Escape character. If single 
special characters listed in this 
table follow \, the specific 
meanings of the characters will 
be removed. 

For example, “\\” can match a string 
containing “\”, “\^” can match a string 
containing “^”, and “\\b” can match a 
string containing “\b”. 

 

When there is a lot of information to be output, the system displays the information in multiple screens. 

Generally, 24 lines are displayed on one screen, and you can also use the screen-length command to 

set the number of lines displayed on the next screen. (For the details of this command, refer to Login