Re: Bug report of tr command.

[Mike Frysinger]

On Monday 13 April 2009 03:45:54 maguowei2723 wrote:
> I want to replace all the word of "root" to "administrator" in test.txt
> file.I get a bit part of the file:
>
> root         1  0.0  0.1   2008   768 ?        Ss   21:03   0:03 /sbin/init
> root         2  0.0  0.0      0     0 ?        S<   21:03   0:00 [kthreadd]
> root         3  0.0  0.0      0     0 ?        S<   21:03   0:00
> [migration/0] root         4  0.0  0.0      0     0 ?        S<   21:03  
> 0:00 [ksoftirqd/0]
>
> yeah,but when I finish the replace by execute command---- tr 'root'
> 'administrator' < test.txt I found the result is not the same with my
> expected.

please read the description of tr again.  it does not convert one string to 
another, it converts a set of characters to another.  so you told it to 
convert the output by doing:
r -> a
o -> m
t -> i
...

if you want to do string replacement, use sed.
-mike