Hi,

Need to delete a line from a file, file is too large so cannot use vi.

I know the line number that has to be deleted...

How can this be done ?

sed <linenum>d file > file2

sed 'linenumberd' filename > newfilename

e.g. to delete 5th line
sed '5d' filename > newfilename

hi how do i delete a block of text from a text file within known line numbers. e.g. from line 43 to lint 58. between and including these kines, i want the block deleted.

the sed command can be used to delete the specific lines in a file

sed '43,58d' infile > outfile

Try this :

##--NOn interactive deletion of lines using vi- editor
vi - a.txt <<END
:11d
:12d
:x
END

##the above code will delete 11th and 42nd line , saves the file and exits

dump the above code in a script and execute it ...

you can also achive the same using sed but sed is a temporary one it wont make the changes permanent to the source file....

thats fine. how do i do it in sed, i could pipe the changes into a new file. i prefer single line commands as i haven't mastered executing scripts yet.