I want to run a Unix command 100 times using a for loop from 1 to 100. Can you tell me how to take a block of numbers in a loop under KSH or BASH shell?
You can use the following syntax to run a for loop.
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Ksh For Loop 1 to 100 Numbers
#!/bin/ksh # Tested with ksh version JM 93t+ 2010-03-05 for i in {1..100} do # your-unix-command-here echo $i done |
Bash For Loop 1 to 100 Numbers
#!/bin/bash # Tested using bash version 4.1.5 for ((i=1;i<=100;i++)); do # your-unix-command-here echo $i done |
Dealing With Older KSH88 or Bash shell
The above KSH and Bash syntax will not work on older ksh version running on HP-UX or AIX. Use the following portable syntax:
#!/usr/bin/ksh c=1 while [[ $c -le 100 ]] do # your-unix-command-here echo "$c" let c=c+1 done |
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This script worked for me in AIX
#!/bin/bash for i in {1..10} do echo $i doneThe Ksh example works in bash (on Ubuntu 14.10)
# display 1 to 10 numbers using while loop
# vi while.sh
# !.bin/sh
a=1
while [[ $a -le 10 ]]
do
echo “$a”
a= ` expr a + 1 ` or let a=a+1
done
# now it display 1 to 1o numbers
seq 1 100
# print 1 to 100
for i in `seq 1 100`; do echo $i; done