Hi,
How can I find the egrep version installed on Solaris 10 as I don't see any egrep --version option.Also wanted to know which version would support option of -A (eg. egrep -A NUM PATTERN FILE )
Print NUM lines of trailing context after matching lines.
Thanks & Regards,
Kiran. (6 Replies)
Hi All,
I have some csv files out of which i want to find records which have empty values in either the 14th or 16th fields.
The following is a sample.
$cut -d',' -f14,16 SPS* | head -5
VOIP_ORIG_INFO,VOIP_DEST_INFO
sip:445600709315@sip.com,sip:999@sip.com... (2 Replies)
Hi,
i wrote If Conditions in my script, it's returns null and some values.
but i am unable to find when Null value getting. bec we need modification according null vales.
pls help me on this. (2 Replies)
Hi,
I am trying to display the filename in which a string was found after using find and grep. For this after some googling I found that this works:
find -name "*.java" -exec grep "searchStr" {} /dev/null \;
I wanted to know the difference between the above and the following:
find -name... (0 Replies)
Hi,
I've a pipe delimited file where I want to find out a number of lines where 1st 2nd and last field are null using awk/sed. Is it possible?
Thanks (5 Replies)
Hi, everyone
I have a requirement as following:
source file
1, abc, def, caaa
2, , cde, aaa
3, bcd, , adefefg
I need find columns which contains null value, in above example,
I need get two rows
2, , cde, aaa
3, bcd, , adefefg
anybody has idea how to achive this
... (5 Replies)
Hi All,
Can some one please help me how to grep the comments from "oracle" & "sybase" code. I would like to grep below type of pattern.
--
/* */
Please help. (6 Replies)
hi Gurus,
I need find the null column in a file.
my file like below
abc, ,cde,def
abc,ded,cdd,def
abc, ,ddd,ccd
aaa,bbb,ccc,ddd
basic, I need to find the lines which second column is null
Thanks in advance (3 Replies)
Hi All
My requirement is to find the null values in particular column of a file and reject it in case if it contains null values. But the challenge is that I want a common command which can be used across different file, as the position of the column we need to check for different file may get... (14 Replies)
Hi there I am trying to figure out and understand what the syntax would be to egrep lines that have a word occur twice in a row. the two words obviously should have a space between them and also it has to be case sensitive which I believe grep is by deffault. the closest I have come is...
grep... (7 Replies)
Discussion started by: spo_2138
7 Replies
LEARN ABOUT BSD
egrep
GREP(1) General Commands Manual GREP(1)NAME
grep, egrep, fgrep - search a file for a pattern
SYNOPSIS
grep [ option ] ... expression [ file ] ...
egrep [ option ] ... [ expression ] [ file ] ...
fgrep [ option ] ... [ strings ] [ file ]
DESCRIPTION
Commands of the grep family search the input files (standard input default) for lines matching a pattern. Normally, each line found is
copied to the standard output. Grep patterns are limited regular expressions in the style of ex(1); it uses a compact nondeterministic
algorithm. Egrep patterns are full regular expressions; it uses a fast deterministic algorithm that sometimes needs exponential space.
Fgrep patterns are fixed strings; it is fast and compact. The following options are recognized.
-v All lines but those matching are printed.
-x (Exact) only lines matched in their entirety are printed (fgrep only).
-c Only a count of matching lines is printed.
-l The names of files with matching lines are listed (once) separated by newlines.
-n Each line is preceded by its relative line number in the file.
-b Each line is preceded by the block number on which it was found. This is sometimes useful in locating disk block numbers by con-
text.
-i The case of letters is ignored in making comparisons -- that is, upper and lower case are considered identical. This applies to
grep and fgrep only.
-s Silent mode. Nothing is printed (except error messages). This is useful for checking the error status.
-w The expression is searched for as a word (as if surrounded by `<' and `>', see ex(1).) (grep only)
-e expression
Same as a simple expression argument, but useful when the expression begins with a -.
-f file
The regular expression (egrep) or string list (fgrep) is taken from the file.
In all cases the file name is shown if there is more than one input file. Care should be taken when using the characters $ * [ ^ | ( ) and
in the expression as they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
Fgrep searches for lines that contain one of the (newline-separated) strings.
Egrep accepts extended regular expressions. In the following description `character' excludes newline:
A followed by a single character other than newline matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (period) matches any character.
A single character not otherwise endowed with special meaning matches that character.
A string enclosed in brackets [] matches any single character from the string. Ranges of ASCII character codes may be abbreviated
as in `a-z0-9'. A ] may occur only as the first character of the string. A literal - must be placed where it can't be mistaken as
a range indicator.
A regular expression followed by an * (asterisk) matches a sequence of 0 or more matches of the regular expression. A regular
expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression. A regular expression followed
by a ? (question mark) matches a sequence of 0 or 1 matches of the regular expression.
Two regular expressions concatenated match a match of the first followed by a match of the second.
Two regular expressions separated by | or newline match either a match for the first or a match for the second.
A regular expression enclosed in parentheses matches a match for the regular expression.
The order of precedence of operators at the same parenthesis level is [] then *+? then concatenation then | and newline.
Ideally there should be only one grep, but we don't know a single algorithm that spans a wide enough range of space-time tradeoffs.
SEE ALSO ex(1), sed(1), sh(1)DIAGNOSTICS
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
BUGS
Lines are limited to 256 characters; longer lines are truncated.
4th Berkeley Distribution April 29, 1985 GREP(1)