Ignore identical lines Post: 302259879

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1. Shell Programming and Scripting

Ignore Lines Begining With #

Is there a standard way to make a shell script read a file, or list, and skip each line that contains # at the begining, or ignores the content starting after a # in line? I'm looking to mimic the way commenting in a shell script normally works. This way I can comment my text files and lists my...

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How can I ignore only the lines which have # at the begining?

From the below file I want to grep only the lines except the comment sections. But grep -v "#" is eliminating the last line because it has one # in between. Any idea how can I ignore only the lines which have # at the begining (I mean comment lines) ? Thanks a lot to all in advance C Saha

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replace 2 identical strings on different lines

I am looking to replace two or more strings on different lines using sed, but not with the same variable. IE # cat xxx.file <abc> abc def ghi abc def ghi abc def ghi currently I can only change each line with the same pattern: # sed -e '/<abc>/!s/abc$.*$/jkl mno/' xxx.file abc jkl mno...

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expect - How to ignore empty lines?

Hi all, I'm looking for a way to generate an error when a command does not print an expected message. For example : test.sh : echo hi!test.exp : exp_internal 1 spawn ./test.sh expect { "hi!" {puts "bingo!"} "*" {puts "error!" ; exit 1} } I expected test.exp to match the string...

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more than 10 identical lines

I have a file that looks like this 10 user1s, 5 user2s and 10 users3. 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.1 user1 10.10.1.2 user2 10.10.1.2 user2 10.10.1.2 user2...

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Scan a file in realtime and execute certain commands on encountering 5 consecutive identical lines

Mysql log has something like below: I need a bash shell script that will do the following: 1) The script will scan the mysql.log file constantly in real time (something like tail -F mysql.log) 2) If it encounters 5 consecutive identical lines then it would invoke some commands (say...

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sed print all lines between second and third identical lines

I am trying to extract a table of data (mysql query output) from a log file. I need to print everything below the header and not past the end of the table. I have spent many hours searching with little progress. I am matching the regexp +-\{99\} with no problem. I just can't figure out how to print...

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Combine identical lines and average the one variable field

I have the following file 299899 chrX_299716_300082 196 78.2903 299991 chrX_299982_300000 18.2538 Tajd:0.745591 FayWu:-0.245701 T2:1.45 299899 chrX_299716_300082 196 78.2903 299991 chrX_299982_300000 18.2538 Tajd:0.745591 FayWu:-0.245701 T2:0.283 311027 chrX_310892_311162 300 91.6452...

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How to delete identical lines while leaving one undeleted?

Hi, I have a file as follows. file1 Hello Hi His Hi Hi Hungry hi so I want to delete identical lines while leaving one of them undeleted. So desired output will be Hello Hi

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awk - If field value of consecutive records are the identical print portion of lines

I have some data that looks like this: PXD= ZW< 1,6 QR> QRJ== 1,2(5) QR> QRJ== 4,1(2) QR> QRJ== 4,2 QRB= QRB 4,2 QWM QWM 6,2 R<C ZW< 11,2 R<H= R<J= 6,1 R>H XZJ= 1,2(2) R>H XZJ= 2,6(2) R>H XZJ= 4,1(2) R>H XZJ= 6,2 RDP RDP 1,2 What I would like to do is if fields $1 and $2 are...

LEARN ABOUT MINIX

grep

GREP(1) 						      General Commands Manual							   GREP(1)

NAME

       grep - search a file for lines containing a given pattern

SYNOPSIS

       grep [-elnsv] pattern [file] ...

OPTIONS

       -e     -e pattern is the same as pattern

       -c     Print a count of lines matched

       -i     Ignore case

       -l     Print file names, no lines

       -n     Print line numbers

       -s     Status only, no printed output

       -v     Select lines that do not match

EXAMPLES

       grep mouse file	   # Find lines in file containing mouse

       grep [0-9] file	   # Print lines containing a digit

DESCRIPTION

       Grep  searches  one  or	more  files (by default, stdin) and selects out all the lines that match the pattern.  All the regular expressions
       accepted by ed and mined are allowed.  In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or  1
       occurrences,  and  |  can  be used between two regular expressions to mean either one of them.  Parentheses can be used for grouping.  If a
       match is found, exit status 0 is returned.  If no match is found, exit status 1 is returned.  If an error is detected,  exit  status  2	is
       returned.

SEE ALSO

       cgrep(1), fgrep(1), sed(1), awk(9).

																	   GREP(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Ignore Lines Begining With #

Discussion started by: sysera

2. Shell Programming and Scripting

How can I ignore only the lines which have # at the begining?

Discussion started by: csaha

3. Shell Programming and Scripting

replace 2 identical strings on different lines

Discussion started by: prkfriryce

4. Shell Programming and Scripting

expect - How to ignore empty lines?

Discussion started by: whbos