Ubuntu – How to prepend filenames with ascending numbers like 1_ 2_

bashbatch-renamecommand line

How can I add numbers to the files in one directory?

In one directory I have files like below:

fileA
fileB
fileC
fileD

I want to prepend ascending numbers to them, like this:

1_fileA
2_fileB
3_fileC
4_fileD

Thank you in advance.

Best Answer

One of the solutions:

cd <your dir> then run in bash (copy and paste in command-line):

n=1; for f in *; do mv "$f" "$((n++))_$f"; done

Bash script case:

#!/bin/bash
n=1
for f in *
do
  if [ "$f" = "rename.sh" ]
  then
    continue
  fi
  mv "$f" "$((n++))_$f"
done

save it as rename.sh to dir with files to rename, chmod +x rename.sh then run it ./rename.sh

Copying files from a source- into a target directory, adding the containg folder's name to the file

The script below will copy files recursively from a source directory into a flat directory, adding the name of the (direct) superior directory to the file's name. The directory's name will be inserted before possible extension on the file, exacvtly like your example.

The script

#!/usr/bin/env python3
import os
import sys
import shutil

for root, dirs, files in os.walk(sys.argv[1]):
    for f in files:
        # split off the superior directory's name
        dirname = root.split("/")[-1]
        # define file+path, possible extension position
        src = os.path.join(root, f); spl = f.rfind(".")
        # defining new filename
        newname = f[:spl]+"_"+dirname + f[spl:] if spl != -1 else f+"_"+dirname
        # copy the file into the new directory
        shutil.copyfile(src, os.path.join(sys.argv[2], newname))

How to use

Copy the script intyo an empty file, save it as copyandrename.py

Run it with the source- and target directories as arguments:

python3 /path/to/copyandrename.py <source_directory> <target_directory>

My test command was e.g.

python3 '/home/jacob/Bureaublad/pscript_4.py' '/home/jacob/Bureaublad/testmap' '/home/jacob/Bureaublad/target'

As always, please test on a sample first!

Ubuntu – Search output of AWK in another file

Can be achieved easily with awk as follows:

awk 'NR==FNR{inFileA[$1]; next} ($1 in inFileA)' fileA fileB > write_to_fileC

result,

seg1       one
seg2       two
seg3       three

at above, first we are reading the fileA and holds the entire column1 from into an array named inFileA, then look in fileB for its first column and if it's matched with the saved column1 from fileA then goes to print entire row of fileB.

Best Answer

Related Solutions

Ubuntu – How to copy files from multiple directories, adding the parent folder’s name to the filename

Copying files from a source- into a target directory, adding the containg folder's name to the file

The script

How to use

Ubuntu – Search output of AWK in another file

Related Question