1. UNIX for Dummies Questions & Answers

Hi I have a file with data arranged into columns. The first column is the chromosome name. When I use grep to subset only rows with chr1, I get chr1 but also chr10, chr11,.. How do I get only rows with chr1? grep chr1 filein > fileout head fileout chr1 59757841 chr11 108258691 ... (2 Replies)

2. UNIX for Dummies Questions & Answers

Hi, I'm struggling with a regex that would match a 'b' that follows an 'a' and is at the end of a string of non-white characters. For example: Line 1: aba abab b abb aab bab baa I can find the right strings but I'm lacking knowledge of how to "discard" the bits that precede bs.... (2 Replies)

3. Shell Programming and Scripting

Hi all, any idea how to match the following: char*<no or any string or space> buf and char *<no or any string or space> buf i need to capture the buf characters too. currently i need two checks to cover this: #search char* <any string> buf or char *<any string> buf @noarray =... (2 Replies)

4. Shell Programming and Scripting

Hello All I have file which contain sample data like below - test.txt ---------------------------------------------- jambesh aaa india trxxx sdasd mentor asss light train bbblah --------------------------------------------- I want to write a regX which would print only those... (4 Replies)

5. Shell Programming and Scripting

I am trying to match a similar line using grep with regular expression the line is /remote/mac/pbbbb/abc/def/hij/hop/include/abc/tif/element/test/testfiles/Office.cpp:57: const OfficeType& getType().get() const; I just need to extract the bold characters using grep with regular expression.... (5 Replies)

6. Shell Programming and Scripting

hi everyone suppose we have two scenario echo ABCD | grep \{4\} DATE echo SYSDATE | grep \{4\} SYSDATE i want to match the string of four length only please help (5 Replies)

7. Homework & Coursework Questions

Hi Everybody! I need some help with a regular expression in Perl that will match files named messages, but also files named message.1, message.2 and so on. So really I need one that will find messages and messages that might be followed by a period and a digit without matching other files like... (2 Replies)

8. Shell Programming and Scripting

I will simplify the explaination a bit, I need to parse through a 87m file - I have a single text file in the form of : <NAME>house........ SOMETEXT SOMETEXT SOMETEXT . . . . </script> MORETEXT MORETEXT . . . (6 Replies)

9. Shell Programming and Scripting

echo 20110101 | awk '{ print match($0,/^((17||18||19||20)|)-*(|0|1)-*(|0||3)$/)) I am getting a match for the above, where as it shouldn't, as there is no hyphen in the echoed date. Another question is what is the difference between || and | in the above statement (4 Replies)

10. Shell Programming and Scripting

Hello, one step in a shell script i am writing, involves Grep command to search a regular expression in a line an only print the string after the match an example line is below /logs/GRAS/LGT/applogs/lgt-2016-08-24/2016-08-24.8.log.zip:2016-08-24 19:12:48,602 ERROR... (9 Replies)