Usage - Description - Options - Examples
numl [log logfile] [options] [infile] [to outfile]
numl copies infile to outfile, preceeding every line with a lines number.
If you don't specify infile, numl reads from standard input.
If you don't specify outfile, numl writes to standard output.
If you don't specify logfile, numl writes error messages to standard
error.
-f[-][0]W[S] : Line number format.
Optional - : left justify.
Optional 0 : pad with zeros.
W : width, 1 .. 99.
Optional S : separator string (max. 10 chars).
-sN : Start numbering with number N.
-nw : Don't number lines containing only whitespace.
-ne : Don't number empty lines.
-cw : Don't count or number lines containing only whitespace.
-ce : Don't count or number empty lines.
-v : Print version banner and usage info to standard error (or logfile, if given), then exit.
Consider the example file "mydata.txt", containing four lines:
this is the first line
and this is the second
and this is the last
The command:
numl mydata.txt
prints:
1 this is the first line
2 and this is the second
3
4 and this is the last
The command:
numl -s0 -nw "-f03 : " mydata.txt
prints:
0000 : this is the first line
0001 : and this is the second
0003 : and this is the last
The command:
numl -cw mydata.txt
prints:
1 this is the first line
2 and this is the second
3 and this is the last