Errata

Errata for Linux Pocket Guide

Submit your own errata for this product.

The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update

Version	Location	Description	Submitted By	Date submitted	Date corrected
Printed, PDF, ePub	Page 13 Under "Linux help sites"	The recommended site www.linuxforums.org is no longer a Linux site. It appears to be a scam site. Avoid it.	Daniel J. Barrett	Nov 12, 2023
	Page 105 Last paragraph, starting with -w N	I believe that the command name "sort" in last sentence, "If used with -s or -f, sort will ignore...", should be replaced by "uniq", since it is talking about the -w option of the uniq command. It does not make sense to talk about the behavior of "sort" here, since -s and -f options have different meanings for sort and are not related to skipping a number of characters or fields. Note from the Author or Editor: (Note: in my book, this is page 107, not 105.) The submitter is correct. Under "Useful Options," the final option, "-w N", the second sentence currently reads: If used with -s or -f, sort will ignore[...] The word "sort" should be changed to "uniq" so it reads: If used with -s or -f, uniq will ignore[...]	Haofei	Dec 19, 2021	Jul 21, 2023
	Page 118 last paragraph	About md5sum, it states that "...it produces the 32-byte checksum..." It should be a 16-byte checksum. According to the md5sum man page and RFC 1321, MD5 outputs a 128-bit checksum. Making it 16 not 32 bytes, which is then displayed using 32 hexadecimal characters. Note from the Author or Editor: On page 118, in the section "md5sum", the second sentence contains the phrase "32-byte checksum". Change it to "32-digit checksum".	Jacob Petrie	Sep 09, 2022	Jul 21, 2023
	Page 121 First line under section "ps2ascii"	The first line under the section "ps2ascii", ps2ascii file.(ps\|pdf)] [outfile.txt] has an unmatched close square bracket. Is the open bracket missing (meaning the argument file.(ps\|pdf) is optional) or is the close bracket redundant (file.(ps\|pdf) is mandatory)? Note from the Author or Editor: (Note: in my copy, this error is on page 124.) The error report is correct. In the line indicated by the reporter, the stray right-square-bracket should be removed so the line reads: ps2ascii file.(ps\|pdf) [outfile.txt]	Haofei	Dec 21, 2021	Jul 21, 2023
	Page 127 Heading of section "spell"	The heading for section "spell" shows "stdin stdout -file --opt --" in black, followed by "help --version" in gray. 1. As with all other headings, there should be a space between "-" and "file" as well as between "--" and "opt", which are currently missing. 2. "--help" is confusingly printed half black (for the dashes) and half gray (for the word). Note from the Author or Editor: (Note: In my copy, the error is on page 130, not 127.) The error report is correct. In the heading for the "spell" section, three changes need to be made. (1) Place a space between "-" and "file"; (2) place a space between "--" and "opt"; (3) In "--help", the initial "--" should be in grey, not black.	Haofei	Dec 21, 2021	Jul 21, 2023
ePub	Page 151 1st paragraph	regarding the 'at' command, it says: "offsets are a plus or minus sign followed by whitespace and an amount of time: + 3 seconds," i couldn't get this to work so i checked online and apparantly at does not support seconds as a time increment Note from the Author or Editor: [Note: In the printed edition, the error is on the last line of page 154, not page 151.] Change "+ 3 seconds" to "+ 3 days".	dleghthikos	Mar 01, 2017	May 26, 2017