sed help required

Shell Programming and Scripting
1

Hi All,

I have one file with below type of data in it,

$ cat test.txt
###123
###xyxytuerwb
###2
###tyupe

Here I would like to replace all the characters with "x" after the 3 "###" with the same number of characters.

Can you please help me to achieve this.

2

can you post the output you are expecting?

3

After masking output will look like below,

###xxx
###xxxxxxxxxx
###x
###xxxxx
4 
awk -F# '{gsub(".","x",$NF)}1' OFS=# file
1 Like
5

Hi Franklin,

Thanks a lot it worked perfectly.

One more thing can these "###" retained ?

6

A sed version

 
sed '/^###/ s/./x/g' -e 's/^xxx/###/g' input_file
7

Through tr

tr '[a-z0-9]' 'X' < inputfile

If you have GNU sed

sed 's/./X/4g' inputfile
8 
sed '/^###/s/[^#]/x/g' infile

$ cat tst
###123
blabslbla
###xyxytuerwb
###2
blabla
###tyupe

$ sed '/^###/s/[^#]/x/g' tst
###xxx
blabslbla
###xxxxxxxxxx
###x
blabla
###xxxxx