Two Simple Tricks with Shell Scripts To Improve Your Productivity [Linux]

1. How can I improve my shell scripting skills?
2. How do I make my shell script run faster?
3. What can you do with shell scripting?
4. What are the things needed to write a shell script successfully?
5. Is Shell Scripting hard?
6. What is the best way to learn shell scripting?
7. Which is faster Bash or Python?
8. How do I master a shell script?
9. Is bash and shell the same?
10. How a shell script is executed?
11. When should shell programming scripting not be used?
12. What is $? In Unix?
13. How do I write a shell file?
14. How do I write a script?

How can I improve my shell scripting skills?

10 tips to improve Performance of Shell Scripts

1. #!/usr/bin/sh cnt=1 while [ $cnt -ne 100 ] do echo $cnt >> file let cnt=cnt+1 done.
2. #!/usr/bin/sh cnt=1 while [ $cnt -ne 100 ] do echo $cnt let cnt=cnt+1 done > file.
3. $ cat test.sh #!/usr/bin/sh cnt=1 for i in `cat file` do DT=`date '+%Y%m%d'` FILE=$i_$DT echo $cnt > $FILE let cnt=cnt+1 done.

How do I make my shell script run faster?

There are few ways to make your shell (eg Bash) execute faster. Try to use less of external commands if Bash's internals can do the task for you. Eg, excessive use of sed , grep , awk et for string/text manipulation. If you are manipulating relatively BIG files, don't use bash's while read loop.

What can you do with shell scripting?

A few examples of applications shell scripts can be used for include:

• Automating the code compiling process.
• Running a program or creating a program environment.
• Completing batch.
• Manipulating files.
• Linking existing programs together.
• Executing routine backups.
• Monitoring a system.

What are the things needed to write a shell script successfully?

To successfully write a shell script, we have to do three things:

1. Write a script.
2. Give the shell permission to execute it.
3. Put it somewhere the shell can find it.

Is Shell Scripting hard?

Shell scripting is not particularly difficult for those with the prerequisites. No experience with the underlying commands available — if you don't know how to use the individual tools nor even what problems they solve then it is of course difficult to put them together in a script.

What is the best way to learn shell scripting?

Top Free Resources to Learn Shell Scripting

1. Learn Shell [Interactive web portal] ...
2. Shell Scripting Tutorial [Web portal] ...
3. Shell Scripting – Udemy (Free video course) ...
4. Bash Shell Scripting – Udemy (Free video course) ...
5. Bash Academy [online portal with interactive game] ...
6. Bash Scripting LinkedIn Learning (Free video course)

Which is faster Bash or Python?

While it is true that bash might be faster than python for some select tasks, it can never be as quick to develop with, or as easy to maintain (at least after you get past 10 lines of code or so). Bash's sole strong point wrt python or ruby or lua, etc., is its ubiquity.

How do I master a shell script?

1. Linux Shell Scripting: A Project-Based Approach to Learning

1. Name your shell scripts.
2. Use the proper permissions on your shell scripts.
3. Create and use variables in your scripts.
4. Use shell built-in commands and operating system commands.
5. Make the most out of special variables that are available to you in your scripts.

Is bash and shell the same?

Bash ( bash ) is one of many available (yet the most commonly used) Unix shells. ... Shell scripting is scripting in any shell, whereas Bash scripting is scripting specifically for Bash. In practice, however, "shell script" and "bash script" are often used interchangeably, unless the shell in question is not Bash.

How a shell script is executed?

Steps to write and execute a script

1. Open the terminal. Go to the directory where you want to create your script.
2. Create a file with . sh extension.
3. Write the script in the file using an editor.
4. Make the script executable with command chmod +x <fileName>.
5. Run the script using ./<fileName>.

When should shell programming scripting not be used?

Q #11) When should shell programming/scripting not be used? Answer: Generally, shell programming/scripting should not be used in the below instances. When the task is very much complex like writing the entire payroll processing system. Where there is a high degree of productivity required.

What is $? In Unix?

$? -The exit status of the last command executed. $0 -The filename of the current script. $# -The number of arguments supplied to a script. $$ -The process number of the current shell. For shell scripts, this is the process ID under which they are executing.

How do I write a shell file?

How to Write Shell Script in Linux/Unix

1. Create a file using a vi editor(or any other editor). Name script file with extension . sh.
2. Start the script with #! /bin/sh.
3. Write some code.
4. Save the script file as filename.sh.
5. For executing the script type bash filename.sh.

How do I write a script?

How to Write a Script – Top 10 Tips

1. Finish your script.
2. Read along as you watch.
3. Inspiration can come from anywhere.
4. Make sure your characters want something.
5. Show. Don't tell.
6. Write to your strengths.
7. Starting out - write about what you know.
8. Free your characters from cliché