====== bash ======
 
language syntax

===== for loops =====

   for i in 1 2 3 4 5
   do
      echo "Welcome $i times"
   done

   for i in {1..5} ...

   for i in $(seq 1 2 20)

   for (( c=1; c<=5; c++ ))

   if (disaster-condition)
   then
     break       	   # Abandon the loop.
   fi

  if (condition)
  then
     continue              # Go to next iteration of I in the loop and skip statements3
  fi	  

  for file in /etc/*
  do
     if [ "${file}" == "/etc/resolv.conf" ]
     then
        ...
        break
     fi
  done

\\

== for loop examples: ==


**show 'disc free' space every 10sec:**

  for i in {1..1000}; do df -h ; echo '______'; sleep 10 ; done;


**create a batch of symlinks:**

  for i in `ls /var/www/`; do echo $i; ln -s /var/www/${i}/traffic/ /var/www/webalizer/${i}; done


**remove files, when the list of files is too long for rm:**