tyesterday.1 - plan9port - [fork] Plan 9 from user space
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       tyesterday.1 (1700B)
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            1 .TH YESTERDAY 1
            2 .SH NAME
            3 yesterday \- print file names from the dump
            4 .SH SYNOPSIS
            5 .B yesterday
            6 [
            7 .B -cCd
            8 ] [
            9 .B -n
           10 .I daysago
           11 ] [
           12 .I \-date
           13 ]
           14 .I files ...
           15 .SH DESCRIPTION
           16 .I Yesterday
           17 prints the names of the
           18 .I files
           19 from the most recent dump.
           20 Since dumps are done early in the morning,
           21 yesterday's files are really in today's dump.
           22 For example, if today is February 11, 2003,
           23 .IP
           24 .EX
           25 yesterday /home/am3/rsc/.profile
           26 .EE
           27 .PP
           28 prints
           29 .IP
           30 .EX
           31 /dump/am/2003/0211/home/am3/rsc/.profile
           32 .EE
           33 .PP
           34 In fact, the implementation is to select the most recent dump in
           35 the current year, so the dump selected may not be from today.
           36 .PP
           37 By default, 
           38 .I yesterday
           39 prints the names of the dump files corresponding to the named files.
           40 The first set of options changes this behavior.
           41 .TP
           42 .B -c
           43 Copy the dump files over the named files.
           44 .TP
           45 .B -C
           46 Copy the dump files over the named files only when
           47 they differ.
           48 .TP
           49 .B -d
           50 Run 
           51 .B diff
           52 to compare the dump files with the named files.
           53 .PP
           54 The
           55 .I date
           56 option selects other day's dumps, with a format of
           57 1, 2, 4, 6, or 8 digits of the form
           58 .IR d,
           59 .IR dd ,
           60 .IR mmdd ,
           61 .IR yymmdd ,
           62 or
           63 .IR yyyymmdd .
           64 .PP
           65 The
           66 .B -n
           67 option selects the dump
           68 .I daysago
           69 prior to the current day.
           70 .PP
           71 .I Yesterday
           72 does not guarantee that the string it prints represents an existing file.
           73 .SH EXAMPLES
           74 .PP
           75 See what's changed in the last week in your profile:
           76 .IP
           77 .EX
           78 yesterday -d -n 7 ~/.profile
           79 .EE
           80 .PP
           81 Restore your profile from yesterday:
           82 .IP
           83 .EX
           84 yesterday -c ~/.profile
           85 .EE
           86 .SH FILES
           87 .TF /dump
           88 .B /dump
           89 by convention, root of the dump file system
           90 .PD
           91 .SH SOURCE
           92 .B \*9/bin/yesterday
           93 .SH SEE ALSO
           94 .MR diff (1) ,
           95 .MR hist (1) ,
           96 .MR vbackup (8)
           97 .SH BUGS
           98 It's hard to use this command without singing.