while true do if [ `date +%H` -ge 17 ]; then break # exit loop fi echo keep running ~/bin/process_data done … run other commands here … 总结 永远循环很容易。指定要停止循环的条件却需要花费一些额外的精力。 via:https://www.networkworld.com/article/3562576/how-to-loop-forever-in-ba...
while true do if [ `date +%H` -ge 17 ]; then break # exit loop fi echo keep running ~/bin/process_data done … run other commands here … 总结 永远循环很容易。指定要停止循环的条件却需要花费一些额外的精力。 via:https://www.networkworld.com/article/3562576/how-to-loop-forever-in-ba...
while true do if [ `date +%H` -ge 17 ]; then break # exit loop fi echo keep running ~/bin/process_data done … run other commands here … 总结 永远循环很容易。指定要停止循环的条件却需要花费一些额外的精力。 via:https://www.networkworld.com/article/3562576/how-to-loop-forever-in-ba...
#!/usr/bin/env bash # File: foreverloop.sh count=3 while [[ $count -gt 0 ]] do echo "count is equal to $count" let count=$count+1 # We only changed this line! done 如下是部分运行结果:... count is equal to 29026 count is equal to 29027 count is equal to 29028 ...
while true do df -k | grep home sleep 1 done In this case, you're running the loop with atruecondition, which means it will run forever or until you hitCTRL-C.Therefore, you need to keep an eye on it (otherwise, it will remain using the system's resources). ...
while,for,repeat,和 forever循环。循环语句只能在 always 或 initial 块中使用,但可以包含延迟表达式。while循环while循环语法格式如下:while (condition) begin … end while循环中止条件为 condition 为 fpga开发 循环语句 赋值 sed 转载 hackernew 4月前 ...
The key difference between until loop and while loop is in the test condition. A while loop will keep running as long as the test condition is true; on the flip side, an until loop will keep running as long as test condition is false!
While loop The while loop is used to execute a series of program statements while (so long as) the logical expression evaluates as true. Your PWD should still be ~/testdir. The simplest form of the while loop is one that runs forever. The following form uses the true statement to always...
在Linux系统中，脚本是个举足轻重的家伙，甚至你不会写点脚本，都不能说你会Linux。这句话并不是夸张...
While the command in the command keeps returning 0(success) exit status, the while loop keeps looping/executing. Usually commands inside the while loop change the condition for the next iteration's check.Infinite While loops:Condition is always true, keeps looping forever (Use CTRL-C to exit ...