This is a very useful tutorial. I’m actually facing a problem with the pattern search, and haven’t been able to figure it out. I have a file I need to load to a database, and for that I need to insert a special character when I find the following sequence of characters: double quotes – end of line – double quotes (“\n”). I need to insert a @ symbol between the first double quotes and the end-of-line (“@\n”). The \n is of course the end-of-line character. So far I’m only been able to insert the character using: (“$), sed ‘s/\”$/&@/g’ filename, but sometimes I need to make sure the next line starts with the double quotes character (“). Is there any way to do it with SED pattern matching? I have tried with different combinations, but without any luck.

Thanks in advance, great blog by the way.

Ivan Neva
Oracle DBA

You need to direct the output to another file; otherwise it is written to standard output, i.e. the terminal screen. Hence:

sed ‘s/Linux/Linux-Unix/’ thegeekstuff.txt > new_file.txt

Also want to thank the blogger for this site and its edifying content.

After i type in the command, eg sed ‘s/Linux/Linux-Unix/’ thegeekstuff.txt ,

I type vi thegeekstuff.txt , it appears that the old file remains. Thus, do i still need to type in anything to save the changes in thegeekstuff.txt ??

Thanks in advance.

Can i use two or more find and replace at a time using sed.

sed -n ‘/^$/!{s/]*>//g;p;}’

It’s from this site:

http://www.unix.com/linux/45584-how-remove-only-html-tags-inside-file.html

Print Friendly option is implemented. You’ll see this at the bottom of all articles. Thanks.