How to read a file in unix

Hi , I have few files in a directory. I need to read all the files in that direcory and search for certain criteria in each file and write into a outputfile. I am also writing the each file name to the outputfile. For the above criteria , i have written the script I am using the while-loop to read a file. The file has lines with null-terminated strings words, actually. Hi, I have gps receiver log.. Connected to localhost.

RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. Full Man Repository. Advanced Search. Contact Us. Forum Rules. Viewed 1. Improve this question. Sam Weinberg Sam Weinberg 2, 2 2 gold badges 11 11 silver badges 5 5 bronze badges. Just a reminder, the question is for Linux, for Windows you use type filename command — Hammad Khan. Add a comment. Active Oldest Votes.

Using cat Since your file is short, you can use cat. Using od If your file contains strange or unprintable characters, you can use od to examine the characters. Improve this answer. Does less have any clear advantages over other pager programs like pg , or does it just boil down to personal preference?

SamWeinberg: less has more features than pg. Take a look at the less 1 and pg 1 manpages. There are other pagers as well. Take a look at unix. You can also use the tail command to see the last lines of text. Here is an example that lets you select a file in a menu and then prints it. Overall, although this is an interesting discussion on alternatives, I think cat is simpler.

Not enough of that here. Tools for handling text files on unix are basic, everyday-commands: In unix and linux to print out whole content in file cat filename. Abhishek Abhishek 1 1 silver badge 4 4 bronze badges.

You can use following command to display content of a text file. For more information about cat , run man cat. One option is to use more e. Generally it has been superceeded by less - which was named in jest because less is more. However, if we try that again with another string - for example,. It will overwrite the file with whatever we printed to standard output.

If you want to append standard output to the end of a file without overwriting the other data in the file, use two greater-than signs. For example, type. If you type cat tmp. Although these examples are trivial, redirection is invaluable for quickly editing text files and for writing scripts , which allow you to run analyses for hundreds or thousands of subjects with only a few lines of code. Click here for a video walkthrough of commands for reading text files. This video will also show you how to read help files using the less command and a paging window.

Andy's Brain Book latest. Use cat to string together both the myFile. Print the contents of the new file to stdout. Unix has a built-in command called sort which will sort text numerically or alphabetically. What happens when you use myFile. What about typing this command: cat myFile.