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Top Forums Shell Programming and Scripting Help, I need to get the last date of previous month Post 302170329 by sirrtuan on Monday 25th of February 2008 08:53:08 AM
Old 02-25-2008
Help, I need to get the last date of previous month

Hi, I'm new with Unix, I'm trying to get a last day of previous month with this format: %b %d %Y (example: Feb 25 2008).
Here is what I have so far.

#!/bin/ksh
cur_month=`date +%m`
cur_year=`date +%Y`
prev_month=$(($cur_month-1))

# Check to see if this is January
if [ $prev_month -lt 1 ]
then
prev_year=$(($cur_year-1))
prev_month=12
LastDayOfMonth=`/bin/cal $prev_month $prev_year | grep -v "^$" | tail -1 | awk '{print $NF}'`
else
LastDayOfMonth=`/bin/cal $prev_month $cur_year | grep -v "^$" | tail -1 | awk '{print $NF}'`
fi
==============================================
I can get the last date of the previous month but I don't know how to put it back into the format that I wanted. Please help.

Thank you.
 

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GSIMPLECAL(1)						      General Commands Manual						     GSIMPLECAL(1)

NAME
gsimplecal - lightweight calendar applet SYNOPSIS
gsimplecal [-h|--help|-v|--version|next_month|prev_month] DESCRIPTION
This manual page documents the usage of the gsimplecal command. gsimplecal is a lightweight calendar applet. When it is started, it first shows up, when you run it again, it closes the running instance. It was intentionally made for use with tint2 panel to be launched upon clock click, but of course it will work without it, you can bind it to some hotkey in you window manager, for example. Also, you may configure gsimplecal to display different world timezones clocks. See the CONFIGURATION section to get to know how to. COMMANDS AND OPTIONS
-v, --version Print the program name and version to stdout, then exit with code 0. -h, --help Print the short usage help to stderr, then exit with error code 2. prev_month, next_month If the program is not running, simply run it. If the program is running, change currently displayed month. If no options and commands are given, the program is toggled, i.e. if it is running it stops, otherwise it starts. CONFIGURATION
To configure the application you should manually create the file $XDG_CONFIG_HOME/gsimplecal/config (usually it will be ~/.config/gsimplecal/config) with contents like this: show_calendar = 1 show_timezones = 1 mark_today = 1 show_week_numbers = 0 close_on_unfocus = 0 external_viewer = sunbird -showdate "%Y-%m-%d" clock_format = %a %d %b %H:%M mainwindow_decorated = 0 mainwindow_keep_above = 1 mainwindow_sticky = 0 mainwindow_skip_taskbar = 1 mainwindow_resizable = 0 mainwindow_position = none mainwindow_xoffset = 0 mainwindow_yoffset = 0 clock_label = UTC clock_tz = :UTC clock_label = Local clock_tz = The options are pretty self explanatory, but here is detailed description: show_calendar: 1 or 0, defaults to 1. Sets whether the calendar should be shown. Most users want this option to be 1. show_timezones: 1 or 0, defaults to 0. Sets whether the different timezone clocks should be shown. mark_today: 1 or 0, defaults to 1. Sets whether today's date will be marked in the calendar (besides the default selection, i.e. when you click on the other day, today will remain marked somehow, e.g. in bold print). show_week_numbers: 1 or 0, defaults to 0. Sets whether week numbers are shown in the calendar. close_on_unfocus: 1 or 0, defaults to 0. Sets whether the calendar will close if the window loses focus. Note that if mainwindow_skip_taskbar is set to 1 then the calendar window may not be given focus upon creation external_viewer: string, defaults to empty string. Command line to run when doubleclicking a date. This string is strftime'd (see man strftime for the possible substitutions) and passed to the shell. Thus you can use pipes, redirections, and whatever, I hope. Currently the shell is hardcoded to /bin/sh though. I hope that will do for all the users, but if you've got a trouble, please file a ticket (see REPORTING BUGS). clock_format: string Sets the clocks format. Look man strftime for the possible formats. mainwindow_decorated: 1 or 0, defaults to 0. Tells your window manager to decorate or not to decorate the main window. mainwindow_keep_above: 1 or 0, defaults to 1. Sets whether the main window should be placed on top of other windows by your window manager. mainwindow_sticky: 1 or 0, defaults to 0. Tells your window manager to show gsimplecal on all desktops. mainwindow_skip_taskbar: 1 or 0, defaults to 1. Sets whether the main window should be shown in the task list by your panel or window manager. mainwindow_resizable: 1 or 0, defaults to 1. Sets whether your window manager should allow the main window to be resized. If you are using a tiling window manager which supports floating windows, setting this options to 0 will most likely tell your WM not to tile the window. (Tested with XMonad and Awesome). mainwindow_position: mouse|center|none, defaults to mouse. Tells your window manager where to place the gsimplecal window: mouse close to the mouse cursor position (this one is useful when you bind gsimplecal on some mouse click command); center in the center of the screen; none it's up to your window manager to decide, where to place the window (this one is useful when you bind gsimplecal invocation on some hotkey, so you can configure your window manager to place gsimplecal in some predefined position). mainwindow_xoffset and mainwindow_yoffset: integer, default to 0. Allow for main window position fine tuning. Throw an integer at these, and it'll move the window by that number of pixels. clock_label and clock_tz: string These two options should go in pairs and must be in the order given. Each pair creates new clock. The clock_label variable sets the string to be displayed near the clock, the clock_tz sets the timezone. If you omit the value for clock_tz, local time will be shown. For a list of timezones see man timezone, or ls /usr/share/zoneinfo KEYBOARD ACCELERATORS
You may use the following keyboard accelerators while gsimplecal window has a focus: Escape, Ctrl+w, Ctrl+q: close the window j: switch to the next month k: switch to the previous month J: jump one year forward K: jump one year backward g, Home: jump to the current date These are not yet configurable, but I'm working on it. REPORTING BUGS
Please, report any issues to the gsimplecal issue tracker, available at: https://github.com/dmedvinsky/gsimplecal/issues AUTHOR
Created by Dmitry Medvinsky et al. SEE ALSO
tzset(3), strftime(3) 2012-03-26 GSIMPLECAL(1)
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