Jul 3, 2023 · I am doing a unix script using until loop.The idea of my script is it need to continuously verify the url status whether is up or down.When its up, it will exit the loop. In my script, I will use c...

To kill the outer loop I usually add a sleep command and press CTRL-C some more times: while :; do LONGTIME_COMMAND; sleep 1; done. Please notice: the colon behind while is interpreded as …

I have problem sending AT commands to my USB modem. At first I tried php-serial class, but when I was reading data, I got endless loop with strange data. Then I tried to debug problem and opened pu...

Is there any elegant method/technology-to-use/hack in linux, to achieve such file continuously written is at maximum N bytes long and always contains only last written data (sequentially)? This means no …

Aug 7, 2011 · I encountered the following in /var/log/syslog on Ubuntu 14.04. Mar 24 09:41:19 ripple pulseaudio[4838]: [autospawn] core-util.c: Failed to create secure directory (/run/user/112/pulse): No …

Jun 24, 2018 · Stop endless loop .sh script Ask Question Asked 7 years, 5 months ago Modified 7 years, 5 months ago

May 12, 2017 · 6 Your loop is starting an endless number of shells, but one after the other, not in parallel. The first time the loop runs, it runs bash, which starts a new shell and displays the prompt.

Mar 1, 2018 · I would like to use cat /dev/ttyUSB0 or something similar to monitor serial communication happening through my USB-serial adapter. I am successfully able to send serial commands from …

Jan 31, 2013 · 64 /dev/zero is a special file (in this case, a pseudo-device) that provides an endless stream of null characters (so hex 0x00)? That's why your cat is not outputting anything (but try …

Mar 6, 2022 · What's replenishing my entropy so well, and how can I find the specific source of randomness? As of kernel 5.6, /dev/random obtains randomness from the kernel's CRNG, which is …