Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Print next line

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Print next line
# 1  
Old 03-30-2010
Print next line
I want to print the current and next line of "Mar 02" in the file.

Input

Code:
Mon Mar 02 11:07:02 2009
ABC
Tue Mar 03 11:02:20 2010
Wrong data
Mon Mar 02 11:07:02 2009
XYZ
Mon Mar 02 11:07:08 2010
124
Mon Mar 02 11:07:08 2010
1400

Output

Code:
Mon Mar 02 11:07:02 2009
ABC
Mon Mar 02 11:07:02 2009
XYZ
Mon Mar 02 11:07:08 2010
124
Mon Mar 02 11:07:08 2010
1400

I am using below ;
Code:
awk '{if ($2 == "Mar" && $3 == "02")  print $0}'  ifile

but i am getting

Code:
Mon Mar 02 11:07:02 2009
Mon Mar 02 11:07:02 2009
Mon Mar 02 11:07:08 2010
Mon Mar 02 11:07:08 2010

I want to print next line also.. Your help is appreciated.
Last edited by Franklin52; 03-30-2010 at 05:55 AM.. Reason: Please use code tags!
# 2  
Old 03-30-2010
Code:
sed  -n '/Mar 02/{N;p}' infpufile

# 3  
Old 03-30-2010
Perfect.

but ; after p is missing.
Correct one is :
Code:
sed  -n '/Mar 02/{N;p;}' infpufile

Thanks a lot
Last edited by Franklin52; 03-30-2010 at 05:55 AM.. Reason: Please use code tags!
# 4  
Old 03-30-2010
or,
Code:
awk '/Mar 02/{R=NR}NR==R || NR==R+1' file

or, if you have GNU grep,
Code:
grep -A1 'Mar 02' file

# 5  
Old 03-30-2010
Hi anchal,

can you please explain the awk option in detail
# 6  
Old 03-30-2010
Quote:
Originally Posted by asalman.qazi
Hi anchal,

can you please explain the awk option in detail
NR is a system variable in awk which gives the current record numner (line number) which is being read.

whenever awk finds 'Mar 02', it stores the line number in a variable R and in the the next step, it print the lines with line number R and R+1 (current and next).
# 7  
Old 03-30-2010
Quote:
Originally Posted by anchal_khare
or,
Code:
awk '/Mar 02/{R=NR}NR==R || NR==R+1' file

Code:
awk '/Mar 02/{R=NR}NR<=(R+1)' file

Smilie
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Reading a file line by line and print required lines based on pattern

Hi All, i want to write a shell script read below file line by line and want to exclude the lines which contains empty value for MOUNTPOINT field. i am using centos 7 Operating system. want to read below file. # cat /tmp/d5 NAME="/dev/sda" TYPE="disk" SIZE="60G" OWNER="root"... (4 Replies)
Discussion started by: balu1234
4 Replies

2. Shell Programming and Scripting

Find line then evaluate text on next line, print when condition is met

Hello, I am looking for a specific situation in a text file. The conditions are, > <CompoundName> InChI=1S/C5H12NO2/c1-5(2)4-8-6(3)7/h5H,4H2,1-3H3/q+1 I am looking for cases where the line "> <CompoundName>" is followed by a line that contains the string "InChI=" without regard to... (5 Replies)
Discussion started by: LMHmedchem
5 Replies

3. UNIX for Beginners Questions & Answers

Output to file print as single line, not separate line

example of problem: when I echo "$e" >> /home/cogiz/file.txt result prints to file as:AA BB CC I need it to save to file as this:AA BB CC I know it's probably something really simple but any help would be greatly appreciated. Thank You. Cogiz (7 Replies)
Discussion started by: cogiz
7 Replies

4. Shell Programming and Scripting

How to print previous line of multiple pattern matched line?

Hello, I have below format log file, Comparing csv_converted_files/2201/9747.1012H67126.5077292103609547345.csv and csv_converted_files/22019/97447.1012H67126.5077292103609547345.csv Comparing csv_converted_files/2559/9447.1012H67126.5077292103609547345.csv and... (6 Replies)
Discussion started by: arvindshukla81
6 Replies

5. Shell Programming and Scripting

Echo printing a line in 2 lines; expected to print in one line

Dear All, fileName: therm.txt nc3h7o2h 7/27/98 thermc 3h 8o 2 0g 300.000 5000.000 1390.000 41 1.47017550e+01 1.71731699e-02-5.91205329e-06 9.21842570e-10-5.36438880e-14 2 -2.99988556e+04-4.93387892e+01 2.34710908e+00 4.34517484e-02-2.65357553e-05 3 ... (7 Replies)
Discussion started by: linuxUser_
7 Replies

6. Shell Programming and Scripting

String search and print next all lines in one line until blank line

Dear all I want to search special string in file and then print next all line in one line until blank lines come. Help me plz for same. My input file and desire op file is as under. i/p file: A1/EXT "BSCABD1_21233G1" 757 130823 1157 RADIO X-CEIVER ADMINISTRATION BTS EXTERNAL FAULT ... (7 Replies)
Discussion started by: jaydeep_sadaria
7 Replies

7. Shell Programming and Scripting

Using regex's from file1, print line and line after matches in file2

Good day, I have a list of regular expressions in file1. For each match in file2, print the containing line and the line after. file1: file2: Output: I can match a regex and print the line and line after awk '{lines = $0} /Macrosiphum_rosae/ {print lines ; print lines } ' ... (1 Reply)
Discussion started by: pathunkathunk
1 Replies

8. Shell Programming and Scripting

Print pipe separated list as line by line in Korn Shell

Korn Shell in AIX 6.1 I want to print the below shown pipe (|) separated list line by line. line=es349889|nhb882309|ts00293|snh03524|bg578835|bg37900|rnh00297|py882201|sg175883 for i in line do echo "Hello $line " done I wanted to execute the above for loop. But i can't even set the... (3 Replies)
Discussion started by: polavan
3 Replies

9. Shell Programming and Scripting

read file line by line print column wise

I have a .csv file which is seperated with (;) inputfile --------- ZZZZ;AAAA;BBB;CCCC;DDD;EEE; YYYY;BBBB;CCC;DDDD;EEE;FFF; ... ... reading file line by line till end of file. while reading each line output format should be . i need to print only specific columns let say 5th... (2 Replies)
Discussion started by: rocking77
2 Replies

10. Shell Programming and Scripting

Compare multiple fields in file1 to file2 and print line and next line

Hello, I have two files that I need to compare and print out the line from file2 that has the first 6 fields matching the first 6 fields in file1. Complicating this are the following restrictions 1. file1 is only a few thousand lines at most and file2 is greater than 2 million 2. I need to... (7 Replies)
Discussion started by: gillesc_mac
7 Replies
Login or Register to Ask a Question