https://www.youtube.com/watch?v=S0I0irOam3M

chmod a+x hello.sh <-futási jog
./script.sh <-futtatás

#!/bin/sh

echo ""
date
exit 0
exit 1
valtozo1=12
valtozo2="asd"
echo $valtozo1
echo $1 $2 <-paraméterek amiket mi adtunk meg
read valtozo3
`date` <-parancsként fut le
ls -l

if [] || []
then
...
elif []
then
...
else
...
fi

59, oldal menü

compare min_t max_t min_l max_l = (all_perm min_t max_t min_l max_l) / (old_all_perm min_t max_t min_l max_l)
old_all_perm min_t max_t min_l max_l = length [[(a,b),(c,d)]|a<-[min_t..max_t], b<-[min_l..max_l],c<-[min_t..max_t],d<-[min_l..max_l]]
all_perm min_t max_t min_l max_l = length [[(a,b),(c,d)]|a<-[min_t..max_t],b<-[min_l..max_l],c<-[a..max_t],d<-[b..max_l]]

ERROR: Preparation failed: exit status 1