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This web page khokarv.blogspot.com states the following, "Linux commands Bash scripting Shell scripting." We saw that the webpage said " Friday, March 28, 2014." It also said " How to pause or hold a shell script at run time. You can put the script on hold with kill -19-STOP and you can start it from the same point with kill -18-CONT. You can control the flow with a while loop which will keep on reading a character from key board. Here I am using simple script to print 1 to 50 numbebs, which I placing in background with and get its process ID PID with ! Echo i . This script is helpful when ."