editing files.

hello,
i have a problem.
suppose

file.txt

i want to add lines over those lines in a file if it starts and ends with how and "?" respectively.

i want output like

output
file.txt

thanks

Try this,

 awk '/^how.*\?$/{printf "#asking\n#question\n"}1' filename

thankxxx

actually am new to this shell scripting so after taking an hour or so i wrote the below program.. phew :wall: :wall:.. its very lengthy though

 
#!/bin/sh
echo enter file1 name
read fname

exec<$fname
while read line
do
        opt=${line:0:3}
        if [[ "$string" =~ \ |\' ]]
        then
                echo ""
        else
                if [ "$opt" = "how" ]
                then
                        echo "#asking"
                        echo "#question"
                        echo "$line"
                else
                echo "$line"
                fi
        fi
done

thanxx