I have found following in crontab
* * * * * sleep 5; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 10; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 15; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 20; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 25; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 30; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 35; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 40; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 45; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 50; curl -s -m 10 > /dev/null 2>&1 * * * * * sleep 55; curl -s -m 10 > /dev/null 2>&1 so whats the meaning of curl -s -m 10 here ?
2 Answers
from man curl
--snip--
-m, --max-time <seconds> Maximum time in seconds that you allow the whole operation to take. This is useful for preventing your batch jobs from hanging for hours due to slow networks or links going down. Since 7.32.0, this option accepts decimal values, but the actual timeout will decrease in accuracy as the specified timeout increases in decimal precision. See also the --connect-timeout option. If this option is used several times, the last one will be used. --snip--
-s, --silent Silent or quiet mode. Don't show progress meter or error messages. Makes Curl mute. It will still output the data you ask for, potentially even to the termi- nal/stdout unless you redirect it. If you take a look at the man page for curl, you'll see the following:
-s, --silent Silent or quiet mode. Don't show progress meter or error mes- sages. Makes Curl mute. It will still output the data you ask for, potentially even to the terminal/stdout unless you redirect it. And:
-m, --max-time <seconds> Maximum time in seconds that you allow the whole operation to take. This is useful for preventing your batch jobs from hanging for hours due to slow networks or links going down. Since 7.32.0, this option accepts decimal values, but the actual timeout will decrease in accuracy as the specified timeout increases in decimal precision. See also the --connect-timeout option. If this option is used several times, the last one will be used. So, curl -s -m 10 means that curl will not show progress or error messages, and will timeout after 10 seconds.
