cd tmp/
mkdir npfl092-bash
cd npfl092-bash/
emacs numbers.txt
cat numbers.txt 
less numbers.txt 
history 
less ~/.bash_history 
clear
ls
ls -l
ls --help
ls --help | less
man ls
ls -l numbers.txt 
wc numbers.txt
wc -l numbers.txt
cat numbers.txt 
which wc
echo $PATH
set
set | less
cat numbers.txt 
head -n 3 numbers.txt 
head -n -2 numbers.txt 
tail -n 3 numbers.txt 
cat numbers.txt 
cat numbers.txt | head -n 3
cat numbers.txt | head -n 3 | tail -n 1
cat numbers.txt | sort
cat numbers.txt | sort > sorted.txt
cat numbers.txt | uniq
cat numbers.txt | sort | uniq
cat numbers.txt | sort | uniq -u
cat numbers.txt | sort | uniq -d
cat numbers.txt | sort | uniq -c
cat numbers.txt | sort | uniq -c | sort -nr
emacs freqlist.sh
chmod a+x freqlist.sh 
ls -l
cat numbers.txt | ./freqlist.sh 
export PATH=".:$PATH"
echo $PATH
echo This is a simple content > example.txt
less example.txt 
echo This is a simple content created by $USER > example.txt
less example.txt 
whoami
less ~/.bashrc
emacs numbers.txt
cat numbers.txt | cut -f1
cat numbers.txt | cut -f1 -d ' '
cat numbers.txt | cut -f1,2 -d ' '
cat numbers.txt | sed 's/ /\n/'
cat numbers.txt | tr aeiou AEIOU 
cat numbers.txt | sed 's/ /\n/g'
cat numbers.txt | sed 's/ /\n/g'
cat numbers.txt | sed 's/ /\n/g' | ./freqlist.sh 
cat numbers.txt | sed 's/[ ,.;]/\n/g' | ./freqlist.sh 
cat numbers.txt | sed 's/\(.\)/\1\n/g' | head
cat numbers.txt | sed 's/\(.\)/\1\n/g' | ./freqlist.sh 
cat numbers.txt | sed 's/ /\n/g' | less
cat numbers.txt | sed 's/ /\n/g' | head -n -1 | less
cat numbers.txt | sed 's/ /\n/g' | head -n -1 > firstcolumn
cat numbers.txt | sed 's/ /\n/g' | tail -n +2 | less
cat numbers.txt | sed 's/ /\n/g' | tail -n +2 > secondcolumn 
paste firstcolumn secondcolumn | less
paste firstcolumn secondcolumn | ./freqlist.sh 
emacs Makefile
make printline
make download
less .bash_history