Reading Line by Line in Bash There are several methods for reading a file line by line using Bash. The following sections highlight five methods for processing a file one line at a time using Bash. Method 1: Using Read Command and While Loop The first method is to use theread commandand...
https://unix.stackexchange.com/questions/29878/can-i-access-nth-line-number-of-standard-output https://stackoverflow.com/questions/6022384/bash-tool-to-get-nth-line-from-a-file https://www.geeksforgeeks.org/write-bash-script-print-particular-line-file/ http://bigdatums.net/2016/02/22/3-w...
ls >1 while read line;do wget "http://www.baidu.com/"+line done FILE=test while read CMD;do echo "$CMD"done<"$FILE"
If you need to read a file line by line and perform some action with each line – then you should use awhile read lineconstruction in Bash, as this is the most proper way to do the necessary. In this article i will show the general syntax of thewhile read lineconstruction in Bash an...
Will print out every line of a file to stdout If you want to do stuff with each line you need to loop - in your shell, or a script, like this: for i in `cat file` do #do your stuff to the line which is $i done Or in bash you can do it like: ...
echo"Line No.$n:$line" n=$((n+1)) done<$filename Run the following command to execute the script. $bashreadfile1.sh Run‘cat’command withcompany.txtfile to display the original content ofcompany.txtfile. $ cat company.txt Example -3: Passing filename from the command line and rea...
echo$line; done<OS.txt From the above command, you will get the following response on the terminal window: Example # 2: Reading file using the bash script Create a bash file and then add the below-mentioned code in this file to read the file content. You can store the previous text ...
Line 2:456 Line 3:runoob finish 2.7read命令中不指定变量,那么read命名将它收到的任何数据都放在特殊环境变量REPLY中 1 #!/bin/bash 2 # testing the REPLY environment variable 3 4 read -p "Enter a number: " 5 factorial=1 6 for (( count=1; count< = $REPLY; count++ )) ...
/bin/bashwhile read line; doecho "Line: $line"done < text.txt 输出结果: Line: myyyyyLine: nameeeeLine: issssssLine: 6666666 2. 文件写入 2.1 追加写入 将字符串追加写入到output.txt文件中。 #!/bin/bashecho "Hello, World!" >> output.txtecho "This is a test." >> output.txt...
29 echo "$host,$ip,$ping_status,$dns_status,$ssh_status" >> $output_file 30 done The following line items explain the script entries above: Line 6:Initialize the output file with the header and three new fields to represent the status of reachability viapingand name resolution ...