Saboteur

dos2unix /home/user/list.txt
while read; do
  ln -s "/usr/share/nginx/html/$REPLY" "/usr/share/nginx/html/tst/$REPLY"
done < /home/user/list.txt

MEM="Memory Usage: 277/1983MB (13.97%)"
HDD="Disk Usage: 5/16GB (35%)"
CPU="CPU Load: 0.00"

banner() {
max=$(echo -e "$1"|awk '{if(length>max)max=length}END{printf max}')
echo -e "$1"|awk 'BEGIN{for(i=1;i<'$max'+4;i++){printf "#"};print "#"}{printf "# %'$max's #\n", $0}END{for(i=1;i<'$max'+4;i++){printf "#"};print "#"}'
}

banner "$MEM\n$HDD\n$CPU"

$ banner "$MEM\n$HDD\n$CPU"
#####################################
# Memory Usage: 277/1983MB (13.97%) #
#          Disk Usage: 5/16GB (35%) #
#                    CPU Load: 0.00 #
#####################################

dig google.com +noall +answer|awk '{print $5" "substr($1,1,length($1)-1)}'

max=$(ls -1 | grep -oP "[0-9]*"|sort -n|tail -n1)
length=$(sed "s/^0*//g"<<<"$max"|xargs expr length)
echo "Max number found: [$max], max length: [$length]"

ls -1|while read oldname; do
  oldnum="$(grep -oP "[0-9]*"<<<"oldname")"
  newnum=$(printf "%0${length}d" $(sed "s/^0*//g"<<<"$oldnum"))
  newname=$(sed "s/$oldnum/$newnum/g"<<<"$oldname")
  if [ -f "$newname" ]; then
    echo "Kinly check the following files manually: $oldname $newname"
  else
    echo "Renaming [$oldname] to [$newname]"
    # mv "$oldname" "$newname"
done

read LINE <1.txt
sed -r -i "5s/(.{13})(.*)/\1\$LINE\2/" 2.txt

#!/bin/bash

hr=(0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23)

for i in ${hr[@]}; do
printf "%02d\n" ${hr[i]}
done