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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 40] 40.11 Send Yourself Reminder Mail </TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly & Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:50:41Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-260-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="ch40_01.htm"TITLE="40. Delayed Execution"><LINKREL="prev"HREF="ch40_10.htm"TITLE="40.10 nextday, nextweekday: Tomorrow or Next Weekday "><LINKREL="next"HREF="ch40_12.htm"TITLE="40.12 Periodic Program Execution: The cron Facility "></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><DIVCLASS="htmlnav"><H1><IMGSRC="gifs/smbanner.gif"ALT="UNIX Power Tools"USEMAP="#srchmap"BORDER="0"></H1><MAPNAME="srchmap"><AREASHAPE="RECT"COORDS="0,0,466,58"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="467,0,514,18"HREF="jobjects/fsearch.htm"ALT="Search this book"></MAP><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch40_10.htm"TITLE="40.10 nextday, nextweekday: Tomorrow or Next Weekday "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 40.10 nextday, nextweekday: Tomorrow or Next Weekday "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 40<BR>Delayed Execution</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch40_12.htm"TITLE="40.12 Periodic Program Execution: The cron Facility "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 40.12 Periodic Program Execution: The cron Facility "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-7010">40.11 Send Yourself Reminder Mail </A></H2><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-44920"></A><ACLASS="indexterm"NAME="AUTOID-44922"></A>I use the<SPANCLASS="link"><EMCLASS="emphasis">at</EM> command (<ACLASS="linkend"HREF="ch40_07.htm"TITLE="Making Your at Jobs Quiet ">40.7</A>)</SPAN>to send myself reminders.The <EMCLASS="emphasis">at</EM> job runs a<SPANCLASS="link">mail program (<ACLASS="linkend"HREF="ch01_33.htm"TITLE="UNIX Networking and Communications ">1.33</A>)</SPAN>and feeds the body of the message to the mailer's standard input.Examples:</P><OLCLASS="orderedlist"><LICLASS="listitem"><PCLASS="para">To send a one-line reminder, I use a one-line command like this:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>at 0427 tuesday</B></CODE>at> <CODECLASS="userinput"><B>echo "send summary to Tim today" | mail jpeek@jpeek.com</B></CODE>at> <KBDCLASS="keycap">[CTRL-d]</KBD>%</PRE></BLOCKQUOTE></P><PCLASS="para">It sends mail at (in this case) 4:27 a.m. on the next Tuesday. The mail says:"send summary to Tim today."</P></LI><LICLASS="listitem"><PCLASS="para">To send more than one line, you can use a temporary file:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>vi msgfile</B></CODE> <ICLASS="lineannotation">...put message body in msgfile</I>...% <CODECLASS="userinput"><B>at 0808 feb 28</B></CODE>at> <CODECLASS="userinput"><B>mail jpeek@jpeek.com < msgfile</B></CODE>at> <CODECLASS="userinput"><B>rm msgfile</B></CODE>at> <KBDCLASS="keycap">[CTRL-d]</KBD>%</PRE></BLOCKQUOTE></P><PCLASS="para"></P></LI><LICLASS="listitem"><PCLASS="para">Combine the output of UNIX commands and text with<SPANCLASS="link">backquotes (<ACLASS="linkend"HREF="ch09_16.htm"TITLE="Command Substitution ">9.16</A>)</SPAN>and a<SPANCLASS="link">here document (<ACLASS="linkend"HREF="ch08_18.htm"TITLE="Here Documents ">8.18</A>)</SPAN>:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>at 0115</B></CODE>at> <CODECLASS="userinput"><B>mail -s "Hard-working people" tom << END</B></CODE>at> <CODECLASS="userinput"><B>These employees are working late. They deserve a bonus:</B></CODE>at> <CODECLASS="userinput"><B>`w`</B></CODE>at> <CODECLASS="userinput"><B>END</B></CODE>at> <KBDCLASS="keycap">[CTRL-d]</KBD>%</PRE></BLOCKQUOTE></P><PCLASS="para">That sends a message to <EMCLASS="emphasis">tom</EM> at 1:15 a.m. tonight.(This mailer accepts a subject on the commandline with its <EMCLASS="emphasis">-s</EM> option.The output of the<EMCLASS="emphasis">w</EM> command gives detailed information about logged-in users;not all systems have it.)Unless you understand<SPANCLASS="link">how to quote here-document text (<ACLASS="linkend"HREF="ch45_26.htm"TITLE="Quoted hereis Document Terminators: sh vs. csh ">45.26</A>)</SPAN>,the message shouldn't have anything but letters, numbers, commas, and periods.</P></LI></OL><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-44967"></A>If your system administrator has set up the<SPANCLASS="link"><EMCLASS="emphasis">calendar</EM> (<ACLASS="linkend"HREF="ch48_04.htm"TITLE="Automatic Reminders and More: calendar ">48.4</A>)</SPAN>program, it's good for easy one-line reminders on particular days.If your UNIX has personal<SPANCLASS="link">crontabs (<ACLASS="linkend"HREF="ch40_12.htm"TITLE="Periodic Program Execution: The cron Facility ">40.12</A>)</SPAN>that can send periodic reminders every Tuesday,every hour, or whatever: use the commands in items 1 or 2 above.</P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">JP</SPAN></P></DIV></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch40_10.htm"TITLE="40.10 nextday, nextweekday: Tomorrow or Next Weekday "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 40.10 nextday, nextweekday: Tomorrow or Next Weekday "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="book"HREF="index.htm"TITLE="UNIX Power Tools"><IMGSRC="gifs/txthome.gif"SRC="gifs/txthome.gif"ALT="UNIX Power Tools"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch40_12.htm"TITLE="40.12 Periodic Program Execution: The cron Facility "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 40.12 Periodic Program Execution: The cron Facility "BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172">40.10 nextday, nextweekday: Tomorrow or Next Weekday </TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="index"HREF="index/idx_0.htm"TITLE="Book Index"><IMGSRC="gifs/index.gif"SRC="gifs/index.gif"ALT="Book Index"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172">40.12 Periodic Program Execution: The cron Facility </TD></TR></TABLE><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><IMGSRC="gifs/smnavbar.gif"SRC="gifs/smnavbar.gif"USEMAP="#map"BORDER="0"ALT="The UNIX CD Bookshelf Navigation"><MAPNAME="map"><AREASHAPE="RECT"COORDS="0,0,73,21"HREF="../index.htm"ALT="The UNIX CD Bookshelf"><AREASHAPE="RECT"COORDS="74,0,163,21"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="164,0,257,21"HREF="../unixnut/index.htm"ALT="UNIX in a Nutshell"><AREASHAPE="RECT"COORDS="258,0,321,21"HREF="../vi/index.htm"ALT="Learning the vi Editor"><AREASHAPE="RECT"COORDS="322,0,378,21"HREF="../sedawk/index.htm"ALT="sed & awk"><AREASHAPE="RECT"COORDS="379,0,438,21"HREF="../ksh/index.htm"ALT="Learning the Korn Shell"><AREASHAPE="RECT"COORDS="439,0,514,21"HREF="../lrnunix/index.htm"ALT="Learning the UNIX Operating System"></MAP></DIV></BODY></HTML>⌨️ 快捷键说明
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