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 Line 8:R...
The script outputs the file's contents line by line in standard output. Method 3: Using here Strings Another method of printing a file's contents line by line is to use aherestring to feed the file's contents to thereadcommand. Theherestring connects the contents of a variable, string, ...
Create a bash file and add the following script. This script will take the filename from the command line argument. First argument value is read by the variable $1 which will contain the filename for reading. If the file exists in the current location thenwhileloop will read the file line...
Different Ways to Read File in Bash Script Using While Loop - Reading files is an essential aspect of shell scripting in the Bash environment. In Bash, reading files can be achieved using different techniques, and one of the most popular and versatile me
done < $FILE Cool Tip:Do not be a bore! AddCOLORSto your Bash script! Make it look AWESOME!Read more → Save and execute the script: $ ./script.sh /etc/passwd This is a line: root:x:0:0:root:/root:/bin/bash This is a line: bin:x:1:1:bin:/bin:/sbin/nologin ...
and sysadmins because the output helps both of them with debugging and monitoring. The configuration of most Linux distributions is largely based on files, so it is important to understand the concept of writing data to a text file using a script or redirecting output at the command line. ...
# Usage: Create pdf files from input (wrapper script) # Author: Vivek Gite under GPL v2.x+ #——— #Input file _db="/tmp/wordpress/faq.txt" #Output location o="/var/www/prviate/pdf/faq" _writer="~/bin/py/pdfwriter.py"
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...
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: ...
Are you ready? Let's read! When you can use a bash for looping through lines in file With the loop, you can repeat entire sets of commands an unlimited number of times as you wish. To do this, do not look for complex programming languages, just use a simple bash script, so you ca...