Best way to skip first line?
 

I need to read in a list from a file, but I want to always ignore/skip the first line of this file.

Right now I'm just cat'ing the file and awk'ing the first column as that's all I need. However, this will also give me the first column of the first line which I do not want.

The first entry will probably be the same value everytime, so I could put a test in to skip that, but wondered if there was another quicker way and so that I'm not always testing every value.

Thanks!

Re: Best way to skip first line?
 

more +2 <file>

Re: Best way to skip first line?
 

Or use sed

Re: Best way to skip first line?
 

tail +n <filename>

to start from second line
eg : tail +2 <filename>

Hope this will solve your query

Re: Best way to skip first line?
 

tail +n filename

eg: tail +2 filename

Re: Best way to skip first line?
 

Thanks all, I used more as that was the first response and it worked!!

Re: Best way to skip first line?
 

Here is what I did as the "fastest" way to skip the first line. Fastest=best for my situation.

#include <unistd.h>

#include <stdio.h>

#include <errno.h>



#define BUFFER_SIZE 4096



int main() {

  // Use block I/O

  char buff[BUFFER_SIZE];

  int firstLine = 1;

  size_t numRead;

  while((numRead = read(STDIN_FILENO, buff, BUFFER_SIZE))!=0) {

    if(numRead==-1) {

      perror("read");

      return 1;

    }

    size_t writePos = 0;

    // Skip first line

    if(firstLine) {

      while(writePos<numRead) {

        if(buff[writePos++]=='\n') {

          firstLine = 0;

          break;

        }

      }

    }

    while(writePos<numRead) {

      size_t numWritten = write(STDOUT_FILENO, buff+writePos, numRead-writePos);

      if(numWritten==-1) {

        perror("write");

        return 1;

      }

      writePos += numWritten;

    }

  }

  return 0;

}

Re: Best way to skip first line?
 

Hey there,

Did I miss:

? Just checking :)

, Mike