10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
I am having trouble matching *two* strings from one file anywhere in a line of a second file, and could use some help getting this figured out. My preference would be to use grep for this because I would like to take advantage of its -A option. The latter is due to the fact that I would like both... (2 Replies)
Discussion started by: jvoot
2 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am having file like
$ cat file
sumanth
anil
harish
from the file i want to grep one line at a time depending on the line number.And can it work through grep -n...
TIA
Please use code tags next time for your code and data. Even if its this small... Thanks (10 Replies)
Discussion started by: sumanthupar
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3. Shell Programming and Scripting
hi
# cat test.txt
Test
Date: 20131008 1515
--------------------------------------------------------------------------------------------------------------
Saxx = Proc_m0_s13 : 1640
Saxx = Proc_m0_s15 : 1791
Saxx = Proc_m0_s17 ... (2 Replies)
Discussion started by: justbow
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4. UNIX for Dummies Questions & Answers
I have a flat file that looks like this, let's call it Chromosome_9.txt:
FT /Gene_Name="Guanyl-Acetylase 9"
FT /Gene_Number"36952"
FT /Gene_Name="Endoplasmic Luciferase"
FT /Gene_Number"36953"
FT ... (4 Replies)
Discussion started by: Twinklefingers
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5. UNIX for Dummies Questions & Answers
hello,
i am trying to grep and the show lines from file that starts with *
example of file:
* bobo: dsfdf,sdfsd,sdfsdf
-------------------------------
gogo: sdf,sdfsdf,sdfsdf,sdfsdf
---------------------------------
* bobo2: sdfsdf,sdfsdf,sdfsdf... (5 Replies)
Discussion started by: zigizag
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6. UNIX for Dummies Questions & Answers
Dear forum,
Please excuse my ignorance. I have looked through various forum posts and tried various solutions but have not been able to solve my problem.
File1.txt consist of a list of 100 names (one per line). File2.txt contains details for 1000 people (one per line), with the first field... (7 Replies)
Discussion started by: beginner0302
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7. Shell Programming and Scripting
Hi all,
I need to grep a line from a log file which ensures me that the application server script is executed successfully. Some body please help me on this.
I also need to write a while loop in which i need to use the status of the above grep output. Could some one please tell me how to use... (12 Replies)
Discussion started by: firestar
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8. Shell Programming and Scripting
i have to grep a file which has contents like
/Source/value/valuefile/readme.txt DefaultVersion:=1.7
I have to grep this file with "/Source/value/valuefile/readme.txt" and cut the corresponding value "1.7" from the same line
i tried grep and cut but not working. (1 Reply)
Discussion started by: codeman007
1 Replies
9. Shell Programming and Scripting
Hi,
how can we search for a word (with case ignore )on specific line numbers
ex:
Awk /^regEX/ with condition on first line or second line
Awk/^ regex1/ on line 1
Awk /^regEX2/ on line 3
thanks in advance (4 Replies)
Discussion started by: rider29
4 Replies
10. Shell Programming and Scripting
Dear all,
I am reading a file that has 1 column. While reading I must find the line references from the another file. The following shell doesn't works.
Please help
#!/bin/bash
while read filename; do
grep ${filename} fs_full.dat >> unprocfull.dat;
done < unproc.dat
But when... (2 Replies)
Discussion started by: mr_bold
2 Replies
grep(1) General Commands Manual grep(1)
Name
grep, egrep, fgrep - search file for regular expression
Syntax
grep [option...] expression [file...]
egrep [option...] [expression] [file...]
fgrep [option...] [strings] [file]
Description
Commands of the family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied
to the standard output.
The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm. The command patterns
are full regular expressions. The command uses a fast deterministic algorithm that sometimes needs exponential space. The command pat-
terns are fixed strings. The command is fast and compact.
In all cases the file name is shown if there is more than one input file. Take care when using the characters $ * [ ^ | ( ) and in the
expression because they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
The command searches for lines that contain one of the (new line-separated) strings.
The command accepts extended regular expressions. In the following description `character' excludes new line:
A followed by a single character other than new line matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (dot) 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 new line 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 the following: [], then *+?, then concatenation, then | and new
line.
Options
-b Precedes each output line with its block number. This is sometimes useful in locating disk block numbers by context.
-c Produces count of matching lines only.
-e expression
Uses next argument as expression that begins with a minus (-).
-f file Takes regular expression (egrep) or string list (fgrep) from file.
-i Considers upper and lowercase letter identical in making comparisons and only).
-l Lists files with matching lines only once, separated by a new line.
-n Precedes each matching line with its line number.
-s Silent mode and nothing is printed (except error messages). This is useful for checking the error status (see DIAGNOSTICS).
-v Displays all lines that do not match specified expression.
-w Searches for an expression as for a word (as if surrounded by `<' and `>'). For further information, see only.
-x Prints exact lines matched in their entirety only).
Restrictions
Lines are limited to 256 characters; longer lines are truncated.
Diagnostics
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
See Also
ex(1), sed(1), sh(1)
grep(1)