By WJR, Sun Nov 27 2022
A basic version of the Unix uptime command, implemented in PowerShell. Reports uptime only (not user count or load averages). Testing using PowerShell 7.3 and 5.1 on Windows 10.
jeffr@CALLISTO: D:\Documents\Uptime $ .\uptime.ps1
CALLISTO: 11/27/2022 16:22:20 up 07:12:48
jeffr@IO: C:\Users\jeffr\Documents\Uptime $ .\uptime.ps1
IO: 11/27/2022 16:24:55 up 2 days, 08:32:54
# uptime - Basic PowerShell implementation of the Unix uptime command
# $Author: jeffr $
# $Date: 2022-11-30 17:04:08 -0500 (Wed, 30 Nov 2022) $
# $Revision: 4 $
$c_time = Get-Date
$b_time = Get-CimInstance -ClassName win32_operatingsystem | Select-Object lastbootuptime
$d_time = New-TimeSpan -Start $b_time.lastbootuptime -End $c_time
$a_d_time = ($d_time.ToString()).Split(':')
# Days and hours
if ($a_d_time[0].Contains('.')) {
$a_days = $a_d_time[0].Split('.')
# Day or days?
if ($a_days[0] -eq 1) {
$d_str = 'day'
} else {
$d_str = 'days'
}
$days = "$($a_days[0]) $($d_str), "
$hours = $a_days[1]
} else {
$days = ''
$hours = $a_d_time[0]
}
# Minutes
$minutes = $a_d_time[1]
# Seconds
$a_seconds = ($a_d_time[$a_d_time.Length - 1]).Split('.')
# Output the result
Write-Host "$($env:computername): $($c_time) up $($days)$($hours):$($minutes):$($a_seconds[0])"
By WJR, Sat Nov 12 2022
A set of scripts written in the Rexx programming language that produce localized sun/planetary rise/set times based upon data in The Old Farmer's Almanac. These have been replaced by the Astronomical Almanac scripts, but are still occasionally useful.
Included are supporting libraries (CORTIME.rex and TIMEADJS.rex) and sample data files. The DAY.txt file contains time adjustments for locality and should be replaced with appropriate values for your location (refer to the Time Corrections section in the almanac).
The scripts have been tested on Cygwin, Linux, Windows 10, and FreeDOS.
srss.rex: Takes a file containing uncorrected sunrise and set values from the Old Farmer's Almanac and a file containing time corrections for locality. Outputs corrected values.
jeffr@Ganymede: ~/rise-set-times $ regina srss.rex srss-data.txt DAY.txt | tail -n 5
11/26/2022, 7:32 AM, 5:16 PM
11/27/2022, 7:33 AM, 5:15 PM
11/28/2022, 7:34 AM, 5:15 PM
11/29/2022, 7:36 AM, 5:14 PM
11/30/2022, 7:37 AM, 5:14 PM
planets.rex: Takes a file containing uncorrected planet rise and set values and a file containing time corrections for locality. Outputs corrected values.
jeffr@Ganymede: ~/rise-set-times $ regina planets.rex planet-data-2022.txt DAY.txt | tail -n 5
10/11/2022, Saturn, Set, 2:48 AM
10/21/2022, Venus, Set, 6:52 PM
10/21/2022, Mars, Rise, 9:45 PM
10/21/2022, Jupiter, Set, 5:41 AM
10/21/2022, Saturn, Set, 2:08 AM
rscli.rex: A simple command line interface to the CORTIME library. Takes an uncorrected time, AM/PM, a file containing time corrections for locality, and correction column. Outputs corrected time.
jeffr@Ganymede: ~/rise-set-times $ regina rscli.rex 6:32 AM DAY.txt e
7:16 AM
lod.rex: Takes the output of srss.rex and calculates day lengths.
jeffr@Ganymede: ~/rise-set-times $ regina srss.rex srss-data.txt DAY.txt \ | tail -n 5 | regina lod.rex
12/27/2022, 9:06
12/28/2022, 9:06
12/29/2022, 9:07
12/30/2022, 9:08
12/31/2022, 9:08
By WJR, Thu Nov 10 2022
Hua, my PowerShell based static content generator, now supports Markdown. I wanted to integrate and test it on an actual blog. This page is coded in Markdown.
Integration with my existing blog was simple. All that was required was to modify the md-template.html file in Hua's markdown directory to contain the appropriate HTML structures, and voila!
By WJR, Thu June 23 2022
A set of scripts (bash and awk) used to produce localized planet rise and set times based upon output from aa (Stephen L. Moshier's astronomical almanac program). Output formats include the raw output from aa, CSV, HTML, tabular, and postscript.
planet-rs.sh takes a standard aa input file (refer to my post on aa for an example) and, optionally, format (raw, csv, html, or ps), time zone and a time zone label. In the example outputs below, rise and set times are displayed for Jupiter in July, 2022, EDT (-4 hours from UT).
jeffr@Europa: ~/planet-rs $ ./planet-rs.sh Jupiter-07-2022.txt raw -4 EDT | head Input file: Jupiter-07-2022.txt rises 2022 July 1 Friday 1h 20m 19.873s EDT sets 2022 July 1 Friday 13h 36m 25.567s EDT rises 2022 July 2 Saturday 1h 16m 37.113s EDT sets 2022 July 2 Saturday 13h 32m 54.005s EDT rises 2022 July 3 Sunday 1h 12m 53.963s EDT sets 2022 July 3 Sunday 13h 29m 21.585s EDT rises 2022 July 4 Monday 1h 09m 10.417s EDT sets 2022 July 4 Monday 13h 25m 48.300s EDT rises 2022 July 5 Tuesday 1h 05m 26.473s EDT
jeffr@Europa: ~/planet-rs $ ./planet-rs.sh Jupiter-07-2022.txt csv -4 EDT | head Input file: Jupiter-07-2022.txt 07/01/2022, 01:20 EDT, 13:36 EDT 07/02/2022, 01:16 EDT, 13:32 EDT 07/03/2022, 01:12 EDT, 13:29 EDT 07/04/2022, 01:09 EDT, 13:25 EDT 07/05/2022, 01:05 EDT, 13:22 EDT 07/06/2022, 01:01 EDT, 13:18 EDT 07/07/2022, 00:57 EDT, 13:15 EDT 07/08/2022, 00:54 EDT, 13:11 EDT 07/09/2022, 00:50 EDT, 13:07 EDT
jeffr@Europa: ~/planet-rs $ ./planet-rs.sh Jupiter-07-2022.txt table -4 EDT | head Input file: Jupiter-07-2022.txt +-----------+------------+------------+ | Date | Rise | Set | +-----------+------------+------------+ |07/01/2022 | 01:20 EDT | 13:36 EDT | +-----------+------------+------------+ |07/02/2022 | 01:16 EDT | 13:32 EDT | +-----------+------------+------------+ |07/03/2022 | 01:12 EDT | 13:29 EDT | +-----------+------------+------------+
Here's an example of the HTML output. The example postscript output was converted to PDF using ps2pdf.
The lod.awk script takes CSV output and calculates day lengths.
jeffr@Europa: ~/planet-rs $ ./planet-rs.sh Sun-12-2022.txt csv -5 EST | head | awk -f lod.awk Date, Length of Day 12/01/2022, 9:33 12/02/2022, 9:31 12/03/2022, 9:30 12/04/2022, 9:29 12/05/2022, 9:28 12/06/2022, 9:28 12/07/2022, 9:27 12/08/2022, 9:26 12/09/2022, 9:25
The package below includes a sample aa.ini (edit to reflect desired latitude, longitude, etc.) as well as input files for various planets. The scripts have been tested on Ubuntu Linux and Cygwin.
planet-rs.tar.gz, 2.8K
If you get an error message similar to the following when attempting to use the ps output format:
troff: fatal error: can't find macro file s
It may be due to a missing Groff macro. I solved this issue on Ubuntu Linux by installing the complete Groff package (in addition to the base package, which is installed be default).
By WJR, Thu June 16 2022
Stephen L. Moshier's venerable aa program (an astronomical almanac used to calculate planet and star positions), compiled for Cygwin (gcc version 11.3.0). It can be used interactively, or input can be directed from a text file.
aa - Astronomical Almanac, version 5.6 (aa-5.6.tar.gz, 161K)
Used interactively, simply ./aa. Or with input directed from a file, ./aa < Mars-2022-06.txt. Sample input file Mars-2022-06.txt to display data for Mars in June, 2022. The second set of numbers, ending with -1, tells aa to quit.
Longitude, latitude, altitude, and other local parameters are specified in the aa.ini file. Note: this file must reside in the same directory as the aa executable.
-84.17 ;Terrestrial east longitude of observer, degrees 39.95 ;Geodetic latitude, degrees 252.0 ;Height above sea level, meters 10.0 ;Atmospheric temperature, deg C 1000.0 ;Atmospheric pressure, millibars 1 ; 0 - TDT=UT, 1 - input=TDT, 2 - input=UT 0.0 ;Use this deltaT (sec) if nonzero, else compute it.
Refer to the read.me file included with the distribution.