Hi Folks,
I have a file with all fields defined by byte position, but any field can be empty so I cannot print lines based on a search of specific columns. I need to print all lines of this file where the string of two characters at byte position 100-101 contains the number 27. Any ideas?
... (4 Replies)
Hi,
I'm trying to match records using awk which contain only one occurance of my string, I know how to match one or more (+) but matching only one is eluding me without developing some convoluted bit of code. I was hoping there would be some simple pattern matching thing similar to '+' but... (9 Replies)
Hi there,
i'm having some problems just making an awk script (i've tried this way, but other way can be posible for sure), for the next file
file.txt
<register>
<createProfile>
<result>0</result>
<description><!]></description>
<msisdn>34661461174</msisdn>
<inputOmvID>1</inputOmvID>... (6 Replies)
Hi All,
I would like to extract from a text file m lines skipping n lines after a string occurrency. Is it possible with grep?
e.g.
qqq
ww
eee
rrr
ttt
yyy
uuu
I want to print 2 lines skipping 1 line after the string 'ww'
result would be
rrr
ttt (2 Replies)
Hi All,
as the title says I need to extract N lines after match number X of a pattern.
e.g.
111
xxx
xxx
111
yyy
yyy
111
www
www
111
zzz
zzz
I would like to extract the two lines after the second 111 occurrence.
I tried with grep but I didn't find any options to do that.
Any... (11 Replies)
I'm attempting to write a script to identify users who have sudo access on a server. I only want to extract the ID's of the sudo users after a unique line of text. The list of sudo users goes to the EOF so I only need the script to start after the unique line of text. I already have a script to... (1 Reply)
Hi there, I have the following output,
# raidctl -l
RAID Volume RAID RAID Disk
Volume Type Status Disk Status
------------------------------------------------------
c0t1d0 IM OK c0t1d0 OK
... (4 Replies)
I have a file with the below format,
GS*8*****
ST*1********
A*
B*
E*
RMR*123455(This is the unique number to locate this row)
F*
SE*1***
GE**
GS*9*****
ST*2
H*
J*
RMR*567889(This is the unique number to locate this row)
L*
SE*
GE***** (16 Replies)
hi guys,
i want command or script to display the content of file from 2nd position to last but one position of a file
abcdefghdasdasdsd
123,345,678,345,323
434,656,656,656,656
678,878,878,989,545
4565656667,65656
i want to display the same above file without first and... (2 Replies)
Discussion started by: hemanthsaikumar
2 Replies
LEARN ABOUT V7
grep
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; unless the -h flag is used, the file name is shown if there is more than one input file.
Grep patterns are limited regular expressions in the style of ed(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.
-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 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.
-s No output is produced, only status.
-h Do not print filename headers with output lines.
-y Lower case letters in the pattern will also match upper case letters in the input (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.
-x (Exact) only lines matched in their entirety are printed (fgrep only).
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 matches that character.
The character ^ ($) matches the beginning (end) of a line.
A . 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 * (+, ?) matches a sequence of 0 or more (1 or more, 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.
SEE ALSO ed(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
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.
Lines are limited to 256 characters; longer lines are truncated.
GREP(1)