Skip to main content

Bash check if folder exists


Simple bash script for beginners trying to get their hands wet on bash scripting.

The code below will ask for input and the input should be a string or a folder name.

The script will just do a basic ls and if the folder name is found it will show “The folder is found” or else the next echo statement is displayed.

Instead of simply displaying an echo command a function or another script can be called to execute a process further.

#!/bin/bash
# This script will ask for a string or folder name and check whether it is present or not

echo "Enter folder name, followed by [ENTER]:"

read folder_name

ls | grep ^$folder_name && echo "The folder is found" || echo "The folder cannot be found"
#Script ends

It’s a one liner evaluation, some sort an if then else in other programming languages, the && statement is executed if the evaluation is true, and if the evaluation is false the || is executed.

The read folder_name line, is the statement that will hold the input value from the user, it's equivalent to inputbox on other programming language.

 To find the folder name is using ls command, of course it will also look for files.

To check recursively change the command to: ls -R /folder_path folder_name_to_search

That’s a very basic script which can be used or tweak to build a more useful script. For example, instead of echo an email can be sent to the system admin.


Cheers! Till next time.


================================
Free Android Apps:

Click on links below to find out more:

Linux Android App cheat sheet:

Catholic Rosary Guide  for Android:


Divine Mercy Chaplet Guide (A Powerful prayer):
Labels:

Comments

Post a Comment

Popular posts from this blog

WMIC get computer name

WMIC get computer model, manufacturer, computer name and  username. WMIC is a command-line tool and that can generate information about computer model, its manufacturer, its username and other informations depending on the parameters provided. Why would you need a command line tool if there’s a GUI to check? If you have 20 or 100 computers, or even more. It’s quite a big task just checking the GUI to check the computer model and username. If you have remote computers, you need to delegate someone in the remote office or location to check. Or you can just write a batch file or script to automate the task. Here’s the code below on how get computer model, manufacturer and the username. Open an elevated command prompt and type:     wmic computersystem get "Model","Manufacturer", "Name", "UserName" Just copy and paste the code above, the word “computersystem” does not need to be change to a computer name. A...
Post a Comment
Read more

Print error 016-799 - Fuji Film Xerox

016-799 Fuji Xerox or Fuji Film print error code. That shows a description error as “Print instruction Fail detected in decomposer.” The error code and error description are alien languages for users and even system administrators who are not familiar with Fuji Xerox error code. The error code is quite simple and easy to fix, if the job print goes to the printer but print out doesn’t come out. So, basically the print job was received by the printer, but the printer just doesn’t know what type of paper or what size to use or which tray to utilize for the print out. In some instances, this is just a paper mismatch but the error description; if using Windows 10 to print does not exactly points to what is the issue. First thing to check, is the paper size selected by the user to print. Example, if the printer configuration is A3 and A4 sizes only. But then the person printing the file accidentally chooses “A4 Cover” then this error 016-799 will occur. ...
6 comments
Read more

Notepad++ convert multiple lines to a single line and vice versa

Notepad++ is an awesome text editing tool, it can accept regex to process the text data. If the data is in a “.csv” format or comma separated values which is basically just a text file that can either be opened using a text editor, excel or even word. Notepad++ can process the contents of the file using regex. Example if the data has multiple rows or lines, and what is needed is to convert the whole lines of data into a single line. Notepad++ can easily do it using regex. However, if the data is on a single line and it needs to be converted into multiple lines or rows then regex can also be used for this case. Here’s an example on how to convert multiple rows or lines into a single line. Example data: Multiple rows, just a sample data. Press Ctrl+H, and  on "Find what" type: [\r\n]+ and on "Replace with" type with: , (white space) --white space is needed if need to have a space in between the data. See image below, "Regular Expression" must be se...
1 comment
Read more