Continue:Continue command is similar to the break statement, except that it exits the current iteration of the loop rather than the entire loop. The purpose is to use it when an error has occurred, and we are willing to execute the code further for other iterations of the loop. Example #...
If you want to sync time in multiple servers using bash for loop in Linux then you can use below loop. In this example, we have provided the IP of all Servers in server.txt and then going to every server using for loop and setting thetime to 16:08:00 using date commandas shown bel...
Example Here is a simple example that uses theforloop to span through the given list of numbers − #!/bin/shforvarin0123456789doecho $vardone Upon execution, you will receive the following result − 0 1 2 3 4 5 6 7 8 9
For example, a program that I was telling class the other day, they've been using, we, all of us have been using since probably about 1971 or 72. So it's much older than my students. It's not older than some of you, but it's older than many of you. This program called grab....
For this reason, such loops are called infinite loops.ExampleHere is a simple example that uses the while loop to display the numbers zero to nine −#!/bin/sh a=10 until [ $a -lt 10 ] do echo $a a=`expr $a + 1` done
for 循环重定向 loop (将标准输入和标准输出都重定向了)16-10. 重定向if/then 测试结构16-11. 用于上面例 27、子的names.data数据文件16-12. 记录日志事件17-1. 广播: 发送消息给每个登录上的用户17-2. 仿造文件: 创建一个两行的仿造文件17-3. 使用cat 的多行消息17-4. 带有抑制tab 功能的多行消息...
“for example /root/set_firewall.sh -port_list 7473 7687” fi # Firewall chains need to return at the end iptables -A chain-neo4j-incoming -j RETURN iptables -A chain-neo4j-outgoing -j RETURN # Hook the main rules up to the chains iptables -A INPUT -j chain-neo4j-incoming iptables...
// Daemon process main loop while (1) { // Perform some background task... sleep(30); // Sleep for 30 seconds. } return EXIT_SUCCESS; } 注:这里省略了书中设置系统信号handler的步骤。 这里的daemonize函数完成了标准的守护化转化过程,并确保了程序在后台无依赖地稳定运行。我们编译运行该程序后,...
Remove any current binding for keyseq. -x keyseq:shell-command Cause shell-command to be executed whenever keyseq is entered. The return value is 0 unless an unrecognized option is given or an error occurred. break [n] Exit from within a for, while, until, or select loop. If n is ...
cat /etc/crontab SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root HOME=/ # For details see man 4 crontabs # Example of job definition: # .--- minute (0 - 59) # | .--- hour (0 - 23) # | | .--- day of month (1 - 31) # | | | .--- month (1...