Bash while Loop with sleep Command The sleep command is used to add delay in the script. The delays control the execution of the instructions and create timeouts. Let’s display the 5-second count to the standard output using thewhile loopandsleepcommand. #!/bin/bash i=1 while [ $i -l...
while : do echo "This is another infinite loop." sleep 1 done 在这两个例子中,true和:命令总是返回状态码0(表示成功),因此循环会无限进行下去。 说明如何安全地中断bash中的无限循环: 要安全地中断Bash中的无限循环,可以使用Ctrl+C组合键。这将发送一个中断信号给正在运行的脚本或命令,强制其停止执行。
在终端中运行 `vim sumScript.sh`开启全屏 关闭全屏提示:如果你忘记了如何在 vim 中打字,请记得按 i 进入插入模式, #!/bin/bash # 计算从1到n的所有数字的总和。 sum_numbers() { local n=$1 local sum=0 local i=1 while [[ $i -le $n ]]; do sum=$((sum + i)) i=$((i + 1)) ...
#!/bin/bash while true do if [ `date +%H` -ge 17 ]; then exit # exit script fi echo keep running ~/bin/process_data # do some work done 如果要退出循环而不是退出脚本,请使用 break 命令而不是 exit。 #!/bin/bash while true do if [ `date +%H` -ge 17 ]; then break # exit...
nano whileloop.shThen paste in the following:#!/bin/bash n=0 while : do echo Countdown: $n ((n++)) doneThis will work as a countdown to infinity until you press CTRL + C to stop the script.Now that we’ve tested the while loop, we can move on to the for loop. Create a ...
If you want to do something more elaborate, you could create a script and show a more clear indication that the loop condition became true: #!/bin/bashwhile[!-ddirectory_expected]doecho"`date`- Still waiting"sleep1doneecho"DIRECTORY IS THERE!!!" ...
/bin/bashcdsleep3ls pwd 小quiz:假设我现在在/home/yourname/dir1/dir2/dir3/下,并且运行cd命令后,我会回到/home/yourname/。那么请问上面这个例子中的bash script运行完后,我会在哪里? 可以动手试一试。也许结果和想的不一样。 除了上面的./example.sh的方法,另一种运行bash script的方式是bash example....
Similarly for example we can use while loop to check if file does not exists. This script will sleep until file does exists. Note bash negator "!" which negates the -e option. #!/bin/bash while [ ! -e myfile ]; do # Sleep until file does exists/is created ...
问Bash逻辑检查-使用嵌套的"IF IF“语句重复While循环ENPython 编程中 while 语句用于循环执行程序，即在...
Using a "do while" loop in bash scripting is simple. Here, ‘-le’ keywords indicate the "less than or equal" sign of a normal programming language. The following script will run until the variable's value is greater than five. #!/bin/bash echo "Do while loop example" a=1 while [...