This adds 1 day to the current date/time and subtracts 2 hours (yes I could have just done +22H instead) but this is for illustrative purposes. So now you can do date math without awk, perl, python etc.
#!/bin/sh now=`date -j +%Y%m%d%H%M` newdate=` date -j -v+1D -v-2H ${now} +%Y%m%d%H%M` echo ${now} echo ${newdate}
The other day, someone at a store in our town read that a methamphetamine lab had been found in an old farmhouse in the adjoining county and he asked me a rhetorical question, 'Why didn't we have a drug problem when you and I were growing up?'
I replied that I had a drug problem when I was young!
I was drug to church on Sunday morning.
I was drug to church for weddings and funerals.
I was drug to family reunions and community socials no matter the weather.
I was drug by my ears when I was disrespectful to adults.
I was also drug to the woodshed when I disobeyed my parents, told a lie, brought home a bad report card, did not speak with respect, spoke ill of the teacher or the preacher, or if I didn't put forth my best effort in everything that was asked of me.
I was drug to the kitchen sink to have my mouth washed out with soap if I uttered a profane four-letter word.
I was drug out to pull weeds in mom's garden and flower beds and flower beds and cockleburs out of dad's fields.
I was drug to the homes of family, friends, and neighbors to help out some poor soul who had no one to mow the yard, repair the clothesline, or chop some firewood; and, if my mother had ever known that I took a single dime as a tip for this kindness, she would have drug me back to the woodshed.
Those drugs are still in my veins; and they affect my behavior in everything I do, say, and think. They are stronger than meth, weed, cocaine, crack, or heroin; and, if today's children had this kind of drug problem, America would be a better place.
pkg_info | sort | sed -e 's/-[0-9].*$//' | uniq -c | grep -v '^[[:space:]]*1'
