UNIX Power Tools, 2nd Edition
by Jerry Peek, Tim O'Reilly, and Mike Loukides


Here are the changes that were made in the 4th printing (indicated by 
"0 9 8 7 6 5 4" on the copyright page):


(xxxviii): The sentence before the list changed to:

    Here's a list of authors, their initials, and the articles they wrote
    or contributed to:


[142-144]: table 8-3 revised


{209}: article 11.15: in the .Ps/.Pe section, changed

    % #file#data

to

    % #file#data#

(226): in the last block of code, made the code after the prompts bold


(276): line 3: changed "give" to "gives"


{287}: changed this troff source:

    Let's start with the normal Berkeley \fIls\0\-l\fP output.
    (The default \fIsls\0\-l\fP gives a standard
    date without the
    six-month format switch or another shell programmer's headache, the
    \fItotal\fP line.)

to this:

    Let's start with the style of \fIls\0\-l\fP output that
    has fixed-width columns and doesn't show the group ownership.
    (The default \fIsls\0\-l\fP is similar, but its
    date format doesn't change after six months and it
    doesn't have the \fItotal\fP line.)


[339-340]: articles 19.06 and 19.07 revised


(376): footnote: changed "Note that on a Berkeley UNIX system" to "On
some UNIX systems"


{466}: changed code line 9 to read:

    printf "%s\n%s%s\n", $0, s, m


(521): line 3: changed "inle" to "inTable"


{602}: changed last sentence to end:

    missing, the matched record is written to the standard output.


{609}: in "print", next-to-last line: put "file" in quotes


{636}: revised the first para. as follows:

    .Pe 0.5
    A label consists of a colon (\f(CW:\fP), followed by up to
    seven characters.
    If the label is missing, the \fIb\fP command branches to the end of the 
    script.
    (In the example above, the label \f(CWend\fP was included just to
    show how to use one, but a label is not really necessary
    here.)
    .LP


{662}: article 35.15, fourth paragraph:  Changed from this:

    The following command will print just the permissions
    (columns 1 to 10) and filenames (columns 45 to
    the end of the line, including the space before names) from BSD
    .Xw "\fIls\0\-l\fP output" 0417 :

to this:

    The following command outputs just the permissions
    (columns 1 to 10) and filenames (columns 45 to the end
    of the line, including the space before names) from
    fixed-width
    .Xw "\fIls\0\-l\fP output" 0417 .
    (Some versions of \fIls\0\-l adjust column widths.
    If yours does, \fIcolrm\fP and \fIcut\fP won't help; try
    .Xw \fIawk\fP 2860 .)


{738}: last code, line 2: changed "Mail" and "People" to "mail" and
"people"


{740}: changed "An entry in any of these fields can be a single
number" to "These fields can contain a single number"


[795-796]: item #2 is new


{829}: changed:

    shell. For example, if \fImsgs\fP contains \f(CWfirst\ next \fP, then

to

    shell. For example, if \fImsgs\fP contains \f(CWfirst\ next\fP, then


(840): removed the lone "s"


(932-933): moved the last line on p. 932 to the top of p. 933


(991): under "watchq": changed "script daemon" to "daemon script"