Hopefully, these examples have demonstrated the power of aforloop at the Bash command line. You really can save a lot of time and perform tasks in a less error-prone way with loops. Just be careful. Your loops will do what you ask them to, even if you ask them to do something destr...
When given one ormore filenames on the command line, this program uses the strings program (which isincluded in the GNU binutils package) to generate a list of readable text “words” in eachfile. The for loop processes each word in turn and determines if the current word is thelongest ...
2.forLoop Command Firstly, let’s quickly refresh onforloops: $ for i in /home/*; do echo "$i"; done /home/user1 /home/user2 Here,we list the files and directories in the/homedirectory viaglobbingand iterating through the result. ...
《Linux Command Line and Shell Scripting Bible》Part 13 更多的结构化命令(for while until) for命令 基本语法格式 for var in list do commands done 也可以写成 for var in list; do commands done 读取列表中的值 1 2 3 4 5 6 7 8 9 10 11 12 13 14 shijianzhongdeMacBook-Pro:part_13 shijia...
reverse_xiaoyu Linux Shell 之 for 循环语句 1、for 命令 重复执行一系列命令在编程中很常见。通常你需要重复一组命令直至达到某个特定条件,比如处理某个目录下的所有文件、系统上的所有用户或是某个文本文件中的所有行。 bash shell提供了for命令,允许你创建一个遍历一系列值的循环。每次迭代都使用其中一个值来...
break Exit from a loop ? builtin Run a shell builtin bzip2 Compress or decompress named file(s) c cal Display a calendar case Conditionally perform a command cat Display the contents of a file cd Change Directory cfdisk Partition table manipulator for Linux chgrp Change group ownership chmod ...
if a line may include spaces better use a while loop: # cat filelist.txt | while read LINE; do echo "${LINE}"; done 1. 2. 3. 4. 10 Bash for Loop In One Line Examples Bash For Loop Examples In Linux What Is Bash in Linux?
/bin/bashfor((i=0;i<1;i+=0))doecho"infinite loop"done 1. 2. 3. 4. 5. while循环 和for循环一样,while循环也是一种运行前测试语句,语法更简单: whileexpressiondocommanddone 1. 2. 3. 4. 首先while将测试expression的返回值,如果返回值为真则执行循环体,返回值为假则不执行循环。循环完成后进入...
For Linux, the command line system in Packet Sender follows the same pattern as other Linux utilities. It has a long name (such as --version) and a short name (such as -v). These options can be arranged in any order and Packet Sender will parse them correctly. The last 3 options ar...
staticvoidMain(string[] args){// Set up matrices. Use small values to better view// result matrix. Increase the counts to see greater// speedup in the parallel loop vs. the sequential loop.intcolCount =180;introwCount =2000;intcolCount2 =270;double[,] m1 = InitializeMatrix(rowCount, ...