I want to produce an endless stream of people like /dev/zero but I want it to spam custom made character (like 'a') as opposed to 0x00. Is there a way to get it done?
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I have a command which i want to own run once more instantly each time it terminates, so I ran a little something such as this:
2 Seems like the modem is echoing the command back again to you (predicted) but then the tty port is sending the command back into the modem and developing your endless loop. Consider: stty -echo to forestall the port from echoing the commands again towards the modem.
In modern day Bash you can do anything like lure : TERM INT; snooze infinity & hold out which complies with each of the above mentioned requirements.
Does that imply it is actually properly pinging the IP? Or that it is trying and failing and hoping once again? How do I get it to prevent?
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How can Japanese persons fully grasp the looking at of one kanji with several readings in their daily life?
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after which sent command echo "AT" > /dev/ttyUSB0 after that I generally acquired under no circumstances ending loop from cat /dev/ttyUSB0 such as this:
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To the shell’s applications, a command which exits using a zero exit standing has succeeded. A non-zero exit position indicates failure. This seemingly counter-intuitive scheme is utilised so You can find 1 very well-described way to point success and many different strategies to point various failure modes.
To eliminate the outer loop I more info ordinarily increase a sleep command and push CTRL-C some more occasions: whilst :; do LONGTIME_COMMAND; rest 1; done. Please discover: the colon behind whilst is interpreded as Accurate, so This can be an endless loop.
EDIT: The explanation you bought the AT - Alright loop, is you have enabled nearby terminal echo in equally your terminal and over the modem side within the AT interpreter. To turn off echo while in the AT interpreter, challenge: ATE0 (which is a zero) as your first command.