The brackets can be removed like any other character but have to be escaped because they have a special meaning to sed: "\[" will tell sed to treat the left bracket just as that character and with now special meaning at all. (Btw. the same is true for any other character with a special meaning, or "metacharacter" as is the correct denomination of these characters, too. "\*" will be an asterisk and not the wildcard, etc.).
Therefore your sed script is
It is possible to write that even shorter: you can use the bracket-construction itself, observe, that inside brackets metacharacters lose their meanings automatically so you don't even have to escape them:
From the Apache thread in the Adanced forum:
Thats because your browser interprets anything within angle brackets to be an HTML tag. You need to quote these brackets if you want them to appear correctly. The proper quotes are:
&lt; for <
and
&gt; for >
So, for example, you would have... (1 Reply)
:D i am pretty much new to scripting and don't want to pick up bad habits so I am trying to get myself to use brackets in my scripts since I plan on using them alot.. !
in this example of a script I wrote I can not figure out where the brackets go can anyone give me some insight into the use of... (3 Replies)
Hi,
I have a query term like this:
$query="apple NOT banana AND fruits";
$query="a1 NOT prim1 AND a2 NOT a3 OR a5";
I want to apply brackets to the NOT terms and the output should be like this:
$query="apple NOT (banana) AND fruits";
$query="a1 NOT (prim1) AND a2 NOT (a3) OR a5";... (2 Replies)
Hi
I am having hard time getting this right and need some help. I Have several log files, and everyone contains the following 3 lines at the end:
4 ETW000 Disconnected from database.
4 ETW000 End of Transport (0000).
4 ETW000 date&time: 13.01.2011 - 08:03:28
I need to capture the value... (7 Replies)
Hello,
I am trying to write a script using ksh. And I want to get the value within the first brackets of a string. For example:
14/04/11 11:35: 00 This is (nn) from the earth.
Then i hope to get nn in this case.
Can any one advise me how to implement it?
Thank you very much!
nn (2 Replies)
Hi All,
I have a text file which looks like this:
computer programming
systems engineering
I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this:
computer programming
systems engineering
I am using... (3 Replies)
Hi all. i need a small help.
i have written an exit code, which will check whether mo.sh is successful or not. if the status is >0 it will exit the shell.
1>Do you guys think it is a correct way to write?
2>what if i change the double bracket to single. how will it change the o/p.
... (1 Reply)
I have the file sed1.txt and I need to strip the brackets (]) and content inside them only when
I have two or three letters followed by a colon.
for example,it may be any letter, not just abc
]
]
#-- cat sed1.txt
1 ] FISICA
2 ]PORTUGUES
3 ] ]MATEMATICA
4 ]]INGLES ]
5 ]QUIMICA
6... (2 Replies)
Discussion started by: dperboni
2 Replies
LEARN ABOUT NETBSD
glob
GLOB(7) BSD Miscellaneous Information Manual GLOB(7)NAME
glob -- shell-style pattern matching
DESCRIPTION
Globbing characters (wildcards) are special characters used to perform pattern matching of pathnames and command arguments in the csh(1),
ksh(1), and sh(1) shells as well as the C library functions fnmatch(3) and glob(3). A glob pattern is a word containing one or more unquoted
'?' or '*' characters, or ``[..]'' sequences.
Globs should not be confused with the more powerful regular expressions used by programs such as grep(1). While there is some overlap in the
special characters used in regular expressions and globs, their meaning is different.
The pattern elements have the following meaning:
? Matches any single character.
* Matches any sequence of zero or more characters.
[..] Matches any of the characters inside the brackets. Ranges of characters can be specified by separating two characters by a '-' (e.g.
``[a0-9]'' matches the letter 'a' or any digit). In order to represent itself, a '-' must either be quoted or the first or last
character in the character list. Similarly, a ']' must be quoted or the first character in the list if it is to represent itself
instead of the end of the list. Also, a '!' appearing at the start of the list has special meaning (see below), so to represent
itself it must be quoted or appear later in the list.
Within a bracket expression, the name of a character class enclosed in '[:' and ':]' stands for the list of all characters belonging
to that class. Supported character classes:
alnum cntrl lower space
alpha digit print upper
blank graph punct xdigit
These match characters using the macros specified in ctype(3). A character class may not be used as an endpoint of a range.
[!..] Like [..], except it matches any character not inside the brackets.
Matches the character following it verbatim. This is useful to quote the special characters '?', '*', '[', and '' such that they
lose their special meaning. For example, the pattern ``\*[x]?'' matches the string ``*[x]?''.
Note that when matching a pathname, the path separator '/', is not matched by a '?', or '*', character or by a ``[..]'' sequence. Thus,
/usr/*/*/X11 would match /usr/X11R6/lib/X11 and /usr/X11R6/include/X11 while /usr/*/X11 would not match either. Likewise, /usr/*/bin would
match /usr/local/bin but not /usr/bin.
SEE ALSO fnmatch(3), glob(3), re_format(7)HISTORY
In early versions of UNIX, the shell did not do pattern expansion itself. A dedicated program, /etc/glob, was used to perform the expansion
and pass the results to a command. In Version 7 AT&T UNIX, with the introduction of the Bourne shell, this functionality was incorporated
into the shell itself.
BSD November 30, 2010 BSD