Linux - Edit multiple files using another file as source

Question

I have a file (list name.txt) with several names, one per line.

I need to edit or remove all the names that are on listanome.txt of several other files

With grep I think which files should be dictated, but there are many.

grep -Ff listanome.txt /caminho

I’m having trouble using the sed or awk using as a basis a file.

Answer 1

Use your index file listanome.txt to make a script to be used by sed to remove the lines:

To a listanome.txt as below...

$ cat listanome.txt 
ze
jao
juca

...the following sed turns into an delete script for each name in the list:

$ sed 's/^/\//; s/$/\/d/' listanome.txt
/ze/d
/jao/d
/juca/d

So, pass such a command sed to the flag -f of a new sed, which will execute such a script on all files to be affected, supposedly contained in the directory caminho:

$ sed --in-place=.bak -f <(sed 's/^/\//; s/$/\/d/' listanome.txt) /caminho/*

This will delete all lines from all files in the directory caminho containing the names of listanome.txt, backing up with the extension ". Bak" for each changed file.

If your requirement changes, change the first sed according to what you want, for example:

• To delete all lines identical to the index:

  $ sed 's/^/\/^/; s/$/$\/d/' listanome.txt
  /^ze$/d
  /^jao$/d
  /^juca$/d
  

• To replace the line contents with the string "REMOVE":

  $ sed 's/^/\/^\.\*/; s/$/\.\*$\/REMOVER\/g/' listanome.txt
  /^.*ze.*$/REMOVER/g
  /^.*jao.*$/REMOVER/g
  /^.*juca.*$/REMOVER/g
  

Answer 2

You can use the xargs to accomplish the desired task, follows below an example where I list a directory and get all the files . cfg and insert a line into the found files.:

ls *.cfg | xargs sed -i"23i#####################################################"

better understanding the above command:

ls *.cfg -> lists all files ending with the extension .cfg

| xargs -> takes the data that was displayed in the previous command to apply the next command.

sed -i"23i#####################################################" -> inserts a line into each file found in the command ls, in this case I am inserting on line 23 of each file.

I believe that in your need the ideal would be to create a for that reads each line of your first file and after that apply the necessary action.

Answer 3

Using Awk tries to:

awk 'NR==FNR {c[$0]++} !c[$0]'  listanome.txt outro