Question

In Linux, using sed, make the following changes in a txt file:

Deletes trailing white space in each line.

Every comma is followed by exactly one space.

Every period is followed by exactly two spaces.

Make the above into a script procedure called rmHTML().

Answer 1

#scriipt starts here

### rmHTML() is function which takes in filename as pararmeter and
### and removes trailing white space and other changes
rmHTML()
{
filenames=$@
sed -i.bak -e 's/\s*$//g' -e 's/,\s*/, /g' -e 's/\.\s*/. /' $filenames
# -i.bak is backup file
# s/\s*$//g is Deletes trailing white space in each line
# s/,\s*/, /g is Every comma is followed by exactly one space.
# s/\.\s*/. / is Every period is followed by exactly two spaces
}

rmHTML inputFile.txt
echo "content backup is placed at file inputFile.txt.bak"
echo "The file is modified at inputFile.txt"
echo "Content of modified file is shown below: "
cat inputFile.txt

#scriipt ends here

input---file content is shown below:

How are you, seeyou ok
1, 2,3,5 7,abc.cc
uer.u.ier 89
ok now what, see you!!

----------output Changes----

How are you, seeyou ok

1, 2, 3, 5 7, abc. cc
uer. u.ier 89
ok now what, see you!!