()’ in a loop, probably busy-waiting// 循环中调用...sleep 可能会导致忙等待 // 如 FLAG 变量状态未改变 那么线程可能一直循环,并不断进行线程挂起和唤醒原因是否正确主要原因和原文博主所说有很大的关系但不完全正确:我们都知道 Java 线程实际对应着操作系统中的一个线程...比如微服务体系中,客户端上报实例
Bash自动完成是指在Bash命令行中使用Tab键来自动补全命令、文件名、路径等内容的功能。它可以提高命令行操作的效率和准确性。 Bash自动完成可以分为两种类型:文件名自动完成和命令自动完成。 ...
For example, let us use the continue statement to iterate through a range of number and when it reaches a specific number, which in this case will be ‘4’, the continue statement will exit the iteration and go back to the beginning of the loop to begin the next iteration. for i in...
assign_in_env: do_word_assignment;由于命令开始所有赋值之后还有命令,所以使用assign_in_env。 tempenv_assign_error = 0; for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) { this_command_name = (char *)NULL; assigning_in_environment = (assign_func == assign...
1.在库窗口右键新建虚拟机 2.按着贴图做 3. 4.选择32位centos 5. 6. 7. 8. 设定内存大小 设定cpu数量及核心数 可以在菜单栏的编辑--->虚拟网络编辑器设置NAT虚拟网络 9.开启虚拟机 进去之后再点OK next 选择中文简体 next 选择美式键盘 基本存储介质 选择时区亚洲上海... ...
Bash For Loop 示例 1. 解压所有 Zip 文件 以下示例在根目录中查找与“*.zip*”匹配的文件列表,并在该 zip 文件所在的相同位置创建一个新目录,并解压缩该 zip 文件内容。 # cat zip_unzip.sh #! /bin/bash # Find files which has .zip for file in `find /root -name "*.zip*" -type f` do...
#8 0x08060a4a in reader_loop () at eval.c:152 #9 0x0805eae9 in main (argc=1, argv=0xbffff3d4, env=0xbffff3dc) at shell.c:749 (gdb) 2、管道组何时从waitchld 返回 在waitchld 函数中,它是通过waitpid(-1,……)来进行子进程的回收,也就是当管道中的所有子进程都被wait到之后bash才...
Conclusion After going through the examples in this tutorial, you know how to use thebreakstatement to control a loop flow. Next, learn how to useBash commentsto document the scripts from this tutorial.
In the next section, we’ll take a look at more complex uses of loops with arrays in Bash. Advanced Techniques: Bash Array Looping As you become more comfortable with Bash scripting, you’ll find that there are more complex scenarios where you need to loop through arrays. This might includ...
Line 2: Marks the beginning of the for loop and iterate the variable n from 1 to 10. Line 4: Checks the value of n and if the variable is equal to 6, the script echoes a message to stdout and restarts the loop at the next iteration in line 2. ...