On Mon, Mar 04, 2013 at 12:54:49PM +0100, Paul de Weerd wrote:
> On Mon, Mar 04, 2013 at 12:32:32PM +0100, Paolo Aglialoro wrote:
> | Great one!
> | How to put that nice expression into an alias without console complaining
> | when executed?
> |
> |
> | # ls -l | awk '{ SUM += $5 } END { print SUM }'
> | 569047
> |
> | # alias tot="ls -l | awk '{ SUM += $5 } END { print SUM }'"
> | # tot
> | awk: syntax error at source line 1
> | context is
> | { SUM += >>> } <<<
> | awk: illegal statement at source line 1
>
> Escape the "$" in the awk expression:
>
> [weerd@despair] $ alias tot="ls -l | awk '{SUM+=\$5} END {print SUM}'"
> [weerd@despair] $ tot
> 207777
>
> I still wonder why people want to know this (seemingly useless) value.
> What does it even mean ?
>
> [weerd@despair] $ mkdir /tmp/test
> [weerd@despair] $ cd /tmp/test
> [weerd@despair] $ dd if=/dev/zero of=a bs=1024 seek=2048 count=1
> 1+0 records in
> 1+0 records out
> 1024 bytes transferred in 0.000 secs (34133333 bytes/sec)
> [weerd@despair] $ ln a b
> [weerd@despair] $ ls -l
> total 128
> -rw-r--r-- 2 weerd wheel 2098176 Mar 4 12:49 a
> -rw-r--r-- 2 weerd wheel 2098176 Mar 4 12:49 b
> [weerd@despair] $ tot
> 4196352
> [weerd@despair] $ du -csh a b
> 32.0K a
> 32.0K total
>
>
> (note the lie ls(1) spreads here)
>
> | Btw, for higher readability, it would also be great to put periods in the
> | resulting output like: 1.264.691
>
> Well, that should be easy enough to add yourself :) Left as an
> exercise to the reader...
>
> Cheers,
>
> Paul 'WEiRD' de Weerd
But remember, file size and disk usage are two different things,
-Otto
