“`shell timeout 10 sleep 1 “` 这个命令会执行sleep命令,但是设置超时时间为10秒,如果sleep命令在10秒内没有完成,则会被终止。 5. wait命令 wait命令用于等待指定的进程结束。在Linux中,每个进程都有一个唯一的进程ID(PID),可以使用wait命令等待指定PID的进程结束。其基本语法如下: “`shell wait“` 其中,...
echo “Next job has been completed.” wait echo “All jobs have been completed.” 注意:等待的进程必须是“子进程”(在当前shell中启动的进程)。 总结 两者都可以在脚本或命令行中使用。但是,wait 命令仅适用于在后台运行的进程。
echo “First job has been completed.” wait -n echo “Next job has been completed.” wait echo “All jobs have been completed.” 注意:等待的进程必须是“子进程”(在当前shell中启动的进程)。 总结 两者都可以在脚本或命令行中使用。但是,wait 命令仅适用于在后台运行的进程。
echo “Next job has been completed.” wait echo “All jobs have been completed.” 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 注意:等待的进程必须是“子进程”(在当前 shell 中启动的进程)。 总结 两者都可以在脚本或命令行中使用。但是,wait 命令仅适用于在后台运行的进程。
/bin/bash sleep 15 & sleep 9 & sleep 6 & wait -n echo “First job has been completed.” wait -n echo “Next job has been completed.” wait echo “All jobs have been completed.” 注意:等待的进程必须是“子进程”(在当前 shell 中启动的进程)。
/bin/bashsleep15&sleep9&sleep6&wait-n echo “First job has been completed.” wait-n echo “Next job has been completed.” wait echo “All jobs have been completed.” 注意:等待的进程必须是“子进程”(在当前 shell 中启动的进程)。
echo “First job has been completed.” wait -n echo “Next job has been completed.” wait echo “All jobs have been completed.” 注意:等待的进程必须是“子进程”(在当前shell中启动的进程)。 总结 两者都可以在脚本或命令行中使用。但是,wait 命令仅适用于在后台运行的进程。
MAX=5 while [ "$SECONDS" -le "$MAX" ] do echo "This is the $count time to sleep." let count=$count+1 sleep 2 done echo "The running time of this script is $SECONDS" ./runsec.sh This is the 1 time to sleep. This is the 2 time to sleep. ...
for循环是另一种广泛使用的bashshell构造,它允许用户高效地迭代代码。下面演示了一个简单的示例。 #!/bin/bash for (( counter=1; counter<=10; counter++ ))doecho -n "$counter "done printf "\n" 7.接收用户输入 #!/bin/bash echo-n"Enter Something:" ...
for循环是另一种广泛使用的bashshell构造,它允许用户高效地迭代代码。下面演示了一个简单的示例。 #!/bin/bash for (( counter=1; counter<=10; counter++ ))doecho -n "$counter "done printf "\n" 7.接收用户输入 #!/bin/bash echo -n "Enter Something:" ...