Using awk to iterate through list of files?

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I'm pretty unfamiliar with awk, but I am looking for a way to iterate through all files in a directory and execute a simple awk command. My command is a simple substitution that replaces all tabs with two spaces.

awk '{gsub("\t","  ");print}'

How can this be extended to loop through a directory and execute the command on all files?

Pass the files to awk on the command line of course: `

$ awk 'program' *

But probably it is easier to use

$ perl -pe 's/\t/  /g' *

Or, if you would rather have an inplace edit, simply:

$ perl -i.orig -pe 's/\t/  /g' *

Using awk and looping through files in a directory, With a single awk script (without for loop and multiple awk invocations):. Sample input files: $ head reviews_folder/hotel_*.dat� A useful snippet, that shows awk processing a list of files as if it is one stream (notice how the line number is used) find $HOME/.ssh -name "*.pub" -type f \ -exec awk ' {printf "%c) %12s %s%s %s\n", 64 + NR, $1, substr ($2,1,7), substr ($2,length ($2)-7), $3}' \ {} +. example output.

an improved version of Heisenbug's idea

find . -type f -exec awk '{gsub("\t"," ");print}' {} \;

it avoids calling another program like xargs. It seems to be a bit faster with some tests I did.

Iterating over a list using awk, when variable, Hi, I've recently started using Awk commands as i need it to pull information out of a file and give me the mean value of a series of numbers. Here is the code i� 1. Using os.listdir() This method returns a list containing the names of the entries in the directory given by path. The list is in arbitrary order, and does not include the special entries ‘.’ and ‘..’ even if they are present in the directory. Example: print out all paths to files that have jpg or png extension in C:\Users\admin directory

use find and redirect the output to awk:

find . -type f | xargs awk '{gsub("\t"," ");print}'

Awk by Example, Part 2, Learn strategies for looping through directories in Linux. We'll be using the Bash shell in our examples, but these commands may also work in other In this example, we loop through all the files in the current directory. I need to iterate through the subdirectories of a directory and take two of the files, as arguments of an awk script. The script will compare the two files and generate other files. I've this. But I need awk script to take as an argument files. ".*1.txt" and ".*2.txt"

you can do it with one awk command

awk -F"\t" '{$1=$1;print $0 >FILENAME}' OFS=" " file

Linux Commands - Looping Through Directories, Learn how to loop through the files in a directory and run commands command -line shell, but it's recommended that you use either Bash or Z� Awk is more than just a command; it's a programming language with indices and arrays and functions. That's significant because it means you can grab a list of fields you want to sort by, store the list in memory, process it, and then print the resulting data.

A useful snippet, that shows awk processing a list of files as if it is one stream (notice how the line number is used)

find $HOME/.ssh -name "*.pub" -type f \
  -exec awk '{printf "%c) %12s %s...%s %s\n", 64 + NR, $1, substr($2,1,7), substr($2,length($2)-7), $3}' \
  {} +

example output

A)      ssh-dss AAAAB3N...WhdJHA== bob@your.uncle
B)  ssh-ed25519 AAAAC3N...9a5kCpbT bob@your.uncle
C)      ssh-rsa AAAAB3N...fzh3oUGZ bob@your.uncle

Command-line Basics: How to Loop Through Files in a Directory , A list of strings or array or sequence of elements can be iterated by using for loop in bash Duration: 5:55 Posted: Sep 13, 2018

Bash Loop Through a List of Strings – Linux Hint, And another for loop is for-in loop that is used to iterate any list of data or array. the use of these two types of loops in awk command by using various examples. Create a text file named sales.txt and add the following content to practice this �

How to use for loop in awk command – Linux Hint, The syntax to loop through each file individually in a loop is: create a In this case, cycle through all files in the current directory using the�

How to write a loop in Bash, Just use a for..do..done loop: for f in *; do echo "File -> $f" done. You can replace the * with *.txt or any other glob that returns a list (of files, directories,�

Comments
  • do you know if perl be used to join together another substitution ex. awk '{gsub("\t"," ");print}' | sed "s/foo/bar/g"? If so, than perl might be the best solution as you stated.
  • @dr.bunsen: Yes, of course, just separate commands with a semicolon: perl -pe 's/\t/ /g; s/foo/bar/g'
  • thank you! i think ill start trying to learn perl, these commands are really convenient as one liners!
  • That looks at filenames, not at file contents.