Shell Programming and Scripting

Hi All,

My source file contains special characters(Latin characters).I need to fetch only the lines which contains the special characters. The problem is i don't know which all latin/special characters can come in the source.

Is there anyway to extract the lines which contain letters other than the valid characters(a-z,A-Z,0...9)

Please help me out in this.

Thanks in advance

If you have perl you can use below

Code:

 
perl -nle 'print if m{^[[:ascii:]]+$}' inputfile

Thanks dude.

But I don't have pearl

---------- Post updated at 02:40 PM ---------- Previous update was at 12:43 PM ----------

On a second thought, My requirement exactly is to delete those lines which contain the characters .... !!

Code:

grep -v "[[:alnum:]]" infile > newfile

If you want to reverse that, remove the -v.

If you want to edit the file in place, you can check if your sed supports -i:

Code:

sed -i '/[[:alnum:]]/d' infile

d stands for delete in this case. If you want to reverse it, use !d.