happy coding and have fun

'<,'>g/^/ s/$/;/

:let i=0 | '<,'>g/^/ s/^/=printf("%05d",i)/g | let i+=1

ctrl+shift+left, ctrl+shift+right

:g/^$/d

echo abc | fold -1

:r !seq 1 20 | xargs -I{} bash -c "printf '%02d\n' {}"

cat foolog | awk '{print $11, length($0)}' | awk '{stat[$1] += $2} END {for(i in stat){print i":"stat[i]}}' | sort -t':' -n -k3,3

cat foo.log | sed -n '/getloginappaccount.v2/,/^2021-04-/p' | sed "s/^2021-04.+/AAAAA/g" | uniq | grep -E '(^imei:|^oaid:|AAAAA)' | awk 'BEGIN{buf=""}{if($1=="AAAAA") print buf, buf=""; if($1!="AAAAA") buf = buf" "$0;}'

seq 1 100 | awk 'BEGIN {mat = 0}{ if ($1~/^1/) { if (mat == 0) {print $0;mat = 1;} } else { print $0} } '

seq 100 | sed -n '/^1/bx ; p; D; :x; {x; /^$/bz; D; :z; g; p;};'

1,%g/^$/ d

head tb.list | sed -E 's/.(user_balance":"[^"]").}}([0-9]$)/\1 \2/g'

cat cheat.list | awk '{print $2}' | xargs -I{} bash -c "cat foo_*.list | sed -n '/{}/bx;D; :x; p;q;'"

echo "AAAA BBBB CCCC" | while read a b c; do echo $a; echo $b; echo $c; done