Replace exact word with blank

Shell Programming and Scripting
1

i have a file with the below content
file1.txt

ALERTADMIN.FIELD
ALERTADMIN.TX_ALERTS_LOG

i have another file
file2
ALERTADMIN.FIELD
ALERTADMIN.FIELD_WS
ALERTADMIN.SECTION_FIELD_WS
ALERTADMIN.TX_ACCT_PROCESSING_WORK_TABLE
ALERTADMIN.TX_ACCT_REVIEW_EXEC_METRICS
ALERTADMIN.TX_ALERTS_ERRORS
ALERTADMIN.TX_ALERTS_PROCESSING_QUEUE

Now for every line in file1, if it is present in file2 then it has to be replaced with the blank.

Here ALERTADMIN.FIELD is present is both file1 and file2. In file2 i want to replace it with blank

Please make sure that the word ALERTADMIN.FIELD_WS is not replaced with blank and _WS is left out

So my output has to be like this

ALERTADMIN.FIELD_WS
ALERTADMIN.SECTION_FIELD_WS
ALERTADMIN.TX_ACCT_PROCESSING_WORK_TABLE
ALERTADMIN.TX_ACCT_REVIEW_EXEC_METRICS
ALERTADMIN.TX_ALERTS_ERRORS
ALERTADMIN.TX_ALERTS_PROCESSING_QUEUE

2 
awk 'NR==FNR{a[$0]++}!a[$0]' file1 file2

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3

thanks a lot.

it worked :slight_smile: