Copy word from 1 file to another using Bash

user_8114190 0
Viewed 257

I'm trying to copy over only specific words from 1 text file to another.

this is what is inside my username2.txt:

jason,visitor
mark,staff
orlando,visitor

I'm trying to copy over only jason and orlando to another txt file so it'll just be like:

jason
orlando

this is currently my bash script (as of right now, it only creates a blank txt file):

#!/bin/bash

username="username2.txt"

while IFS=, read username1 group1; do
 if [ $group1 = "visitor" ]; then
   awk $username1 $username > reportvisitors.txt
 fi
 done < $username
awk bash
3 Answers

This could be easily done with awk and we do not need to use a while loop for this since awk itself could read Input_file itself.

username="username2.txt"
awk -F, '$2=="visitor"{print $1}' "$username" > "reportvisitors.txt"

Explanation: Simple explanation is, making field separator as , for all lines of Input_file(which is a shell variable named username). Then inside main program checking condition $2=="visitor" to check if 2nd field is visitor then printing 1st column. At last of this awk program sending output to reportvisitors.txt.

user_58665800

Replace

awk $username1 $username > reportvisitors.txt

with

echo "$username1" >> reportvisitors.txt

Update

#!/bin/bash

username="username2.txt"

while IFS=, read username1 group1; do
 if [ "$group1" = "visitor" ]; then
   echo "$username1"
 fi
 done < $username > reportvisitors.txt
user_37768580

You have to edit the line 7 to

echo $username1 >> reportvisitors.txt

The Code should look like

#!/bin/bash

This part makes sure that an already existing file with the name is deleted

FILE=reportvisitors.txt
if test -f "$FILE"; then
    rm $FILE 
fi

from here on I have only edited line 5

username="username2.txt"

while IFS=, read username1 group1; do
    if [ $group1 = "visitor" ]; then
        echo $username1 >> reportvisitors.txt
    fi
done < $username
user_144288880
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