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Run a command on each line of a text file

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http://www.unix.com – Say I have a text file, with several lines. Each line may contain spaces or the # symbol. For each line, I want to pass that line as the path of a file, in order to add it to a tar file. I've tried this but doesn't work: Code: cat contents.txt | xargs -0 `tar -uvf contents.tar $1` Any ideas? Note: I've tried tar with -T option but would like to do it another way. I've tried as well this but separates lines containing spaces: Code: for i in $(cat file)  do  #do your stuff to $i here  done (HowTos)

Shoutmeloud's picture
Submitted by Shoutmeloud on 10/30/2012 – Made popular on 10/30/2012

Stories similar to Run a command on each line of a text file

Hi,

I have a file with many lines, then i have following list of lines(line number 5,12,19,5,and 28) i need to replace these lines of a file with another lines as shown below these text contains special charecter like= (/:;){}[]

Code: Line_number  Text to replace with 5                  abc xyg ;, : def 12        &nbs

Edit first line of a text file 38 weeks 2 days ago

Hi friends,

Issue1:

I have a text file with the first line like this

Code: #chrom        start        end        Readcount_A        Normalized_Readcount_A        ReadcountB        Normalized_Readcount_B        Fc_A_vs_B       

Hi, I'd like to do an operation on text with a format like this

Code: this line shall be numbered     this line shall not be numbered this line shall also be numbered     this line shall not not be numbered And I want an output like this

Code: 1 this line shall be numbered     this line shall not be numbered 2 this line shall also be numbered

Hi All,

I have 4 big files which contains one big line containing formatted character records, I need to format each file in such way that each File will have 95 Characters per line.

Hello Could you please help me to find a code that can randomly select 1224 lines from a file of 12240 and make tn output with 1224 line each. my input is txt file with 12240 lines like :

Code: 13474        999003507        0        0        2        -9 13475        9990035

Hi,

I copied the contents of a binary file into a .text file using hd (hexdump) command.

Hey, not too good at this, so I only managed a clumsy and SLOW solution to my problem that needs a drastic speed up. Any ideas how I write the following in awk only?

Code is supposed to do... For every line read column values $6, $7, $8 and do a calculation with the same column values of every other line in the same file.

Hello ,

I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file.

Can someone tell me how i could go about doing this?

Directory Search Perl 1 year 1 week ago

Code: @scriptfiles=glob('*.txt');   foreach $file (glob('*.txt')) {     open(my $fh, $file) or die("Unable to open '$file': $!");      while (my $line = <$fh>)     {         if ($line =~ m/(Apple|Orange|Guava)/i)         {             $Sheet->Cells($row,$col-1)-&