head command Post: 302108133

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Simple Command (head) Question

Okay, this probably sounds dumb for anyone who knows the answer, but I'm completely lost. I have to use the head command to search a directory AND all of its subdirectories to display the first line of all .txt files. I know how to do this: head -1 ~/UnixCourse/*.txt, but that does not search the...

2. UNIX for Dummies Questions & Answers

head command wont work on MF file

I am trying to do a head on a mainframe file and on doing ti just gives me a blank screen with nothing on it. however, when i do a tail for the same file...i get a few lines on the screen. i know tht mainframe files have all the records on one line...does this have to do something with this....

3. Shell Programming and Scripting

Removing spaces from the output of a head command

Im running the below commands in a script. Total_confirms=`cat $OUTPATH/count_po* | head -4 | tail -1` # echo "Total Confirms records we need: $Total_confirms" >> $LOG2 The problem is its always returning 4 spaces before the result.. Can I pipe the result into something else to remove the...

4. UNIX for Dummies Questions & Answers

alternative for head command

Hi friends,I am new to unix and this is really a dummy question.but please help me out. How to simulate head command without using head command??? also tail command too,also more command. it is given as a homework to do....please tell me how to do

5. Shell Programming and Scripting

head command with more than one file

Hi, I have the following problem. I have files with one column of data (let's say file1.dat, file2.dat...file6.dat), and I would like to record the first value of the column of each file into another file (let's name it fileall.dat), which would have the the six values, one in each column. I use to...

6. Homework & Coursework Questions

Unix find and head command help

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I've been stuck on this problem for 2 days now What command would you enter to list the first lines of all text...

7. Shell Programming and Scripting

Diff/head - not sure if this is the right command to use

Hi, I need some advise on whether there is a better way of doing what I am currently planning to do. Perhaps I should be using arrays instead of re-directing output to files? I need to use a tool/program named ADRCI provided by Oracle to remove trace files that it generates. Honestly it is...

8. Homework & Coursework Questions

UNIX head command not working?

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Write a script that allows the user to print the first n lines or the last n lines of every file in the...

9. Shell Programming and Scripting

Head command queries

we have a file as below AREA,COUNTRY,RANK A,MX,1 A,MX,2 A,MX,5 A,MX,8 A,IN,7 A,IN,5 A,IN,21 B,CN,6 B,CN,2 B,CN,8 B,CN,0 we need the TOP 2 RANK records for the combination of Area, Country as below. i know head -2, which gives top 2 records from file but not sure it lists based on...

LEARN ABOUT CENTOS

head

HEAD(1) 							   User Commands							   HEAD(1)

NAME

       head - output the first part of files

SYNOPSIS

       head [OPTION]... [FILE]...

DESCRIPTION

       Print  the first 10 lines of each FILE to standard output.  With more than one FILE, precede each with a header giving the file name.  With
       no FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --bytes=[-]K
	      print the first K bytes of each file; with the leading '-', print all but the last K bytes of each file

       -n, --lines=[-]K
	      print the first K lines instead of the first 10; with the leading '-', print all but the last K lines of each file

       -q, --quiet, --silent
	      never print headers giving file names

       -v, --verbose
	      always print headers giving file names

       --help display this help and exit

       --version
	      output version information and exit

       K may have a multiplier suffix: b 512, kB 1000, K 1024, MB 1000*1000, M 1024*1024, GB 1000*1000*1000, G 1024*1024*1024, and so on for T, P,
       E, Z, Y.

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report head translation bugs to <http://translationproject.org/team/>

AUTHOR

       Written by David MacKenzie and Jim Meyering.

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full documentation for head is maintained as a Texinfo manual.  If the info and head programs are properly installed at your site, the
       command

	      info coreutils 'head invocation'

       should give you access to the complete manual.

GNU coreutils 8.22						     June 2014								   HEAD(1)