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Questions and Answers
To list all the files present in the current directory ls * 2. to display specific file in directory. ls ______.
To list all the files present in the current directory ls * 2. to display specific file in directory. ls ______.
filename
List all the file with some extension ls . 4. List out all txt files. ls ______.txt
List all the file with some extension ls . 4. List out all txt files. ls ______.txt
List out all java files. ls ______.java
List out all java files. ls ______.java
List out all the files who’s name start with a ls ______.
List out all the files who’s name start with a ls ______.
List out all the files who’s name start with ‘a‘ and end with ‘e‘ ls ______e.*
List out all the files who’s name start with ‘a‘ and end with ‘e‘ ls ______e.*
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Study Notes
Basic File Listing Commands
- The command
ls *
lists all files in the current directory.
Listing Specific Files
- The command
ls filename
displays a specific file in the directory. - The command
ls *.*
lists all files with any extension.
Filtering Files by Extension
- The command
ls *.txt
lists all text files. - The command
ls *.java
lists all Java files.
Filtering Files by Name Pattern
- The command
ls a*.*
lists all files whose name starts with 'a'. - The command
ls a*e.*
lists all files whose name starts with 'a' and ends with 'e'.
Filtering Files by Filename Length
- The command
ls .*
lists all files with a two-character filename. - The command
ls a.*
lists all files with a two-character filename and the first character is 'a'. - The command
ls .*.*
lists all files with at least three characters in the filename.
Filtering Files by Multiple Patterns
- The command
ls [aec]*
lists all files whose name starts with 'a', 'e', or 'c'. - The command
ls [^aec]*
lists all files whose name does not start with 'a', 'e', or 'c'.
Filtering Files by Case
- In Ubuntu, the command
ls [[:lower:]]*
lists all files whose name starts with a lowercase alphabet. - In Ubuntu, the command
ls [[:upper:]]*
lists all files whose name starts with an uppercase alphabet.
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