having a look on the regex site I saw that characters can be search using hex values
http://www.regular-expressions.info/characters.html
So I try to use it whith grep to find a è on a string (octal Decimal Hexa : 350 232 E8) but it doesn't work
E.g.
/usr/bin/echo '\0350' | egrep '\xE8'
... (0 Replies)
Ok, I'm stumped and can't seem to find relevant info.
(I'm not even sure, I might have asked something similar before.):
I'm trying to use shell scripting/UNIX commands to extract URLs from a fairly large web page, with a view to ultimately wrapping this in PHP with exec() and including the... (2 Replies)
Hello everybody,
I'd like to know how is it I should write a regex in unix to match a string not followed by another string (anywhere in the line).
To be more specific, I want to find lines where "drop table" is found, but not followed anywhere in the line by the character "&".
For... (3 Replies)
Hi all,
I'm a beginner with linux, regex, grep, etc
I am trying to get data out of a file that has about 13,000 lines in this format
name - location
I want to grep all the names out to one file and the locations to another so I can put them into a spreadsheet.
Some have hyphenated... (14 Replies)
Hello,
I'm working on unix with grep (GNU grep) 2.5.1. I'm going through some of the newer regex syntax using Regular Expression Reference - Advanced Syntax a guide.
ls -aLl /bin | grep "\(x\)"
Which works, just highlights 'x' where ever, when ever.
I'm trying to to get (?:) to work but... (4 Replies)
Hey everyone,
Basically, all I'm looking for is a way to regex for not a certain string. The regex I'm looking to avoid matching is:
D222
i.e. an equivalent of:
awk '!/D222/'
The problem is that I use this in the following command in a Bash script:
ls ${source_directory} | awk... (1 Reply)
My input contains a single word lines.
From each line
data.txt
prjtestBlaBlatestBlaBla
prjthisBlaBlathisBlaBla
prjthatBlaBladpthatBlaBla
prjgoodBlaBladpgoodBlaBla
prjgood1BlaBla123dpgood1BlaBla123
Desired output -->
data_out.txt
prjtestBlaBla
prjthisBlaBla... (8 Replies)
Hello, all! Maybe the title is badly formulated, you can help me with that...!
I'm using the GNU grep, and I need to make sure that grep will extract only what I tell it to.
I have the following regular expression: *?
Well, I need to make sure I grep only a word which may start with a... (11 Replies)
I have a file that contains the 2 following lines (from /proc/mounts)
/dev/sdc1 /mnt/backup2 xfs rw,relatime,attr2,noquota 0 0
/dev/sdb1 /mnt/backup xfs rw,relatime,attr2,noquota 0 0
I need to match the string in the second column exactly so that only one result is returned, e.g.
> grep... (2 Replies)
Hi all,
I have the following entries in a file:
Cause Indicators=80 90
Cause Indicators=80 90
Cause Indicators=82 90
Cause Indicators=82 90
Cause Indicators=82 90
The first 2 digits might change so I am after a sort of grep which could find any first 2 digits + the second 2,... (3 Replies)
Discussion started by: nms
3 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO awk(1), ed(1), sam(1), sed(1), regexp(2)REGEXP(6)