1 #!/bin/bash 2 3 input_file=hosts.csv 4 output_file=hosts_tested.csv 5 6 echo "ServerName,IP,PING,DNS,SSH" > "$output_file" 7 8 tail -n +2 "$input_file" | while IFS=, read -r host ip _ 9 do 10 if ping -c 3 "$ip
whileread var1 var2doecho $var1 $var2 done<file.txt 参考文献 [1]man read [2]man bash [3]read指令使用方法[4]详细解析Shell中的IFS变量[5]菜鸟教程.Linux read 命令
The IFS is a Bash variable used to set the input field separator, and the -r option prevents backslashes from being interpreted as escape characters. We then use the echo command to print the line to the standard output. Reading a File Using the cat Command The cat command is a Unix ...
This article is all about how to read files in bash scripts using awhile loop. Reading a file is a common operation in programming. You should be familiar with different methods and which method is more efficient to use. In bash, a single task can be achieved in many ways but there is...
bash read file line by line cat fileName | \ while read CMD;do echo $CMD done ls >1 while read line;do wget "http://www.baidu.com/"+line done FILE=test while read CMD;do echo "$CMD"done<"$FILE"
重复一次只修改首字母,重复两次则应用于所有字母 #字符串的替换 ${file/dir/path}:将第一个dir提换为 path:/path1/dir2/dir3/my.file.txt ${file//dir/path}:将全部dir提换为 path:/path1/path2/path3/my.file.txt ref:http://my.oschina.net/leejun2005/blog/368777...
The Perl modules used for writing the Makefile Perl's C header files used for building the module More Perl modules used for running the tests I wrote a little script to be able to run multiple builds in parallel: #!/bin/bash set -eu perl=$1 dir=$(echo "$perl" | cut -d/ ...
1. Create a new bash script: vi descriptors.shCopy 2. Enter the following lines: #!/bin/bash while IFS= read -r -u9 line; do printf '%s\n' "$line" done 9< days.txtCopy In thewhileloop, instruct thereadcommand to read input from a file descriptor by specifying the-uargument and...
Python provides a lot of method to read output from a just executed shell. However many of them has been deprecated(Not recommened). But subprocess works at pre...
I’m currently writing a complicated Linux bash shell script where I need to keep a counter in an external file, and to do so, I need to be able to write to a file and then read from that file. In short, this is how I write my counter to that file: ...