The nested “for” loop can also be used within the Bash code in a single line. So, we have updated the same Bash file after opening it within the nano editor as below. For the first “for” loop, we have used the values x, y, and z. For the inner “for” loop, we have use...
Bash For Loop In One Line with Files # for i in *; do echo "Found the following file: $i"; done # for i in `cat filelist.txt`; do echo ${i}; done; if a line may include spaces better use a while loop: # cat filelist.txt | while read LINE; do echo "${LINE}"; done ...
After the execution of this “for” loop, the output is shown below. The display shows the 10 iterations with the iteration number in the output line. $bashbash.sh Example 05: The last example is a bonus illustration of the “for” loop. The for loop has been started, and the iterator...
Users must note that the ‘*’ is used to read files in the ‘for loop.’ The functioning of the loop is the simple manner by reading each file or folder through the step of the directory and prints with the output in the terminal with the ‘tab’ space. printf "Pinting the files...
Three-expression bash for loops syntax This type of for loop share a common heritage with the C programming language. It is characterized by a three-parameter loop control expression; consisting of an initializer (EXP1), a loop-test or condition (EXP2), and a counting expression (EXP3). ...
for((exp1;exp2;exp3))docommand1 command2done Examples Using theforLoop in Bash The scripts below demonstrate using the for loop in Bash scripts. This script sets the value of the variableito1the first time, and it printsline number 1. Then it goes back to theforloop, sets variableito...
line done 使用while循环 while read -r line do echo $line done < filename While循环中read命令从标准输入中读取一行,并将内容保存到变量...line中。...在这里,-r选项保证读入的内容是原始的内容,意味着反斜杠转义的行为不会发生。输入重定向...
Cool Tip:Write a command once and have it executed N times using BashFORloop!Read more → Bash Script: Read File Line By Line Lets create a Bash script, that takes a path to a file as an argument and prints "This is a line:" before the each line of this file. ...
echo "endless loop" done 等价于 #!/bin/bash while true do echo "endless loop" done 可以在 if/then 中作占位符: #!/bin/bash condition=5 if [ $condition -gt 0 ] #gt表示greater than,也就是大于,同样有-lt(小于),-eq(等于) then : # 什么都不做,退出分支 ...
Usage of * in the bash for loop is similar to the file globbing that we use in the linux command line when we use ls command (and other commands). For example, the following will display all the files and directories under your home directory. This is the concept that is used in the...