11-20-2008
date - 1 day
Hi, I have been trying just about every unix command to come up with yesterday's date (today's date - 1). I have seen all of the help on this forum, and none of it seems to work for me here. We are using Sun Solaris 9 Unix. I am using this script to create a .txt file with ftp commands that I will run from another script. All I want to do, is retrieve whatever files are at the ftp site with a date of yesterday in the filename. I have been trying to get the date right with Unix but obviously I am not having much luck.
I have tried a number of ways to get yesterday's date and none work for me.
#CalcDate=`date +%Y%m%d`
#CalcDate=`date -d yesterday +%Y%m%d`
#date="1 day ago" +"%Y%d%m"
I am able to output today's date to the .txt file using the following (see below).
CalcDate=`date +%Y%m%d`
cd /apps/PT8.44/outputs/backflow
echo 'lcd /apps/PT8.44/outputs/backflow/test' > bflowin.txt
echo 'mget *'$CalcDate* >> bflowin.txt
echo 'quit' >> bflowin.txt
Contents of bflowin.txt after script runs: I need it to be 20081119 (yesterday's date).
lcd /apps/PT8.44/outputs/backflow/test
mget *20081120*
quit
Any help you guys can give would be appreciated.
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DATE(1) General Commands Manual DATE(1)
NAME
date - print and set the date
SYNOPSIS
date [-nu] [-d dst] [-t timezone] [yymmddhhmm [.ss] ]
DESCRIPTION
If no arguments are given, the current date and time are printed. Providing an argument will set the desired date; only the superuser can
set the date. The -d and -t flags set the kernel's values for daylight savings time and minutes west of GMT. If dst is non-zero, future
calls to gettimeofday(2) will return a non-zero tz_dsttime. Timezone provides the number of minutes returned by future calls to gettimeof-
day(2) in tz_minuteswest. The -u flag is used to display or set the date in GMT (universal) time. yy represents the last two digits of
the year; the first mm is the month number; dd is the day number; hh is the hour number (24 hour system); the second mm is the minute num-
ber; .ss is optional and represents the seconds. For example:
date 8506131627
sets the date to June 13 1985, 4:27 PM. The year, month and day may be omitted; the default values will be the current ones. The system
operates in GMT. Date takes care of the conversion to and from local standard and daylight-saving time.
If timed(8) is running to synchronize the clocks of machines in a local area network, date sets the time globally on all those machines
unless the -n option is given.
FILES
/usr/adm/wtmp to record time-setting. In /usr/adm/messages, date records the name of the user setting the time.
SEE ALSO
gettimeofday(2), utmp(5), timed(8),
TSP: The Time Synchronization Protocol for UNIX 4.3BSD, R. Gusella and S. Zatti
DIAGNOSTICS
Exit status is 0 on success, 1 on complete failure to set the date, and 2 on successfully setting the local date but failing globally.
Occasionally, when timed synchronizes the time on many hosts, the setting of a new time value may require more than a few seconds. On
these occasions, date prints: `Network time being set'. The message `Communication error with timed' occurs when the communication between
date and timed fails.
BUGS
The system attempts to keep the date in a format closely compatible with VMS. VMS, however, uses local time (rather than GMT) and does not
understand daylight-saving time. Thus, if you use both UNIX and VMS, VMS will be running on GMT.
4th Berkeley Distribution March 24, 1987 DATE(1)