echo "a\nb" | sed '1d' # deletes first line

cat list.txt | sed '1d' > list.csv # read list.txt and write list.csv without first line

Other useful commands:

grep '^|' # finds first character (pipe|)

sed 's/|//g' # deletes pipe

sed 's/ //g' # deletes space

# deletes first line
echo "a\nb" | sed '1d' 

# read list.txt and write list.csv without first line
cat list.txt | sed '1d' > list.csv 

Other useful commands:

# finds first character (pipe|)
grep '^|' 

# deletes pipe
sed 's/|//g'  

# deletes space
sed 's/ //g'