Print one line of Existing File

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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"...

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Python DictWriter header - not writing in first line of existing file

Hello I am facing a very unique problem and not able to understand why. I have written a function which will check header of the file. If header is present good else it will write the header on top def writeHeaderOutputCSV(fileName): # See if the file exist already try: ...

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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

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Inserting a new line into an already existing file

hello .. I am new to perl scripting, I have a text file, and would like to insert 3 new lines into the same file at different line numbers using perl scripting. Any Help regarding this will be very useful. say the file is sample.txt, contents are aaaaa bbbb ccccc dddd eeeee ffffffff...

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Appending lines from an existing list to each line in another existing list

Evening all ! I would like to ask your expertise on how to accomplish the following ; I have 2 lists, and would like each line from list2 to be appended to each line in list1, resulting in list3 ; List1; alpha beta charlie List2; one two three

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Match a line in File 1 with Column in File 2 and print whole line in file 2 when matched

Hi Experts, I am very new to scripting and have a prb since few days and it is urgent to solve so much appreciated if u help me. i have 2 files file1.txt 9647810043118 9647810043126 9647810043155 9647810043161 9647810043166 9647810043185 9647810043200 9647810043203 9647810043250...

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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...

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Add line with data to existing file

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write new line at the beginning of an existing file

I was trying to find out the easiest way to write new line to the beginning of an exisiting file. I am using KSH.

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Need to add a line of data to already existing file in Unix..

Hello.. I have a text file with 100 lines of data. I need to add 1 line of data to that already existing file at the first line( beginning of the file) , so that the already existing 100 lines will start from 2 nd line.Now the file will have 101 lines of data. Help me on how to add the line...

UNIX for Dummies Questions & Answers