Menu
I am having trouble coming up with the right combination of semicolons and/or braces. I'd like to do this, but as a one-liner from the command line:
while [ 1 ] do foo sleep 2 done 
685
There is no do-while loop in bash. To execute a command first then run the loop, you must either execute the command once before the loop or use an infinite loop with a break condition.
The while read loop. Here, cat reads each line from standard input and writes the line to standard output. It continues until the end-of-file condition is reached on file1, then it stops. In shell programming, we can read a line from standard input using the read command.
while true; do foo; sleep 2; done By the way, if you type it as a multiline (as you are showing) at the command prompt and then call the history with arrow up, you will get it on a single line, correctly punctuated.
$ while true > do > echo "hello" > sleep 2 > done hello hello hello ^C $ <arrow up> while true; do echo "hello"; sleep 2; done If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
