Linux like command line on Windows Files

** Java 1.8.0_92 have been used for these programs. These programs have been tested on Windows 10.

** These programs act like on linux/unix/cygwin but they are not as complete as on linux/unix/cygwin,
   but whatever functionalities have been provided, they work well.

** Download and Install instructions:

		*** Create a directory and download all files in the same directory. Let's call this directory C:\linux-command-line.

   		*** Now, add the following directories (for Java, assuming you have already downloaded and installed Java) to your
   		"system" PATH environemnt variable (not for your account but system environment variable):
   		
   			If Java has been installed in C:\Program Files\Java\jre1.8.0_92 then add the following directories to 
   			system PATH environment variable (Add using edit text directly):
   				;C:\Program Files\Java\jre1.8.0_92;C:\Program Files\Java\jre1.8.0_92\bin;C:\Program Files\Java\jre1.8.0_92\lib

   			Please note that all directories should be separated by a semi-colon.

   		*** Next, create a "system" CLASSPATH environment variable (if not already present) (CLASSPATH contains diretories where
   		Java looks in for finding classes) so that you can place your classes anywhere in the filesystem and execute the commands
   		from any directory.

   			We have already created C:\linux-commnd-line where all the classes that you downloaded reside, so we will add this
   			directory to CLASSPATH plus a few more.

   			So, create a system CLASSPATH environment variable and add the following directories:
   				.;C:\linux-command-line;C:\Program Files\Java\jre1.8.0_92;C:\Program Files\Java\jre1.8.0_92\bin;C:\Program Files\Java\jre1.8.0_92\lib;

   			Please note that we have added '.' directory at the beginning.

   		*** Please refer to these two pages for more details (or you can google for java CLASSPATH on Windows, java PATH on Windows, etc.):
				https://docs.oracle.com/javase/tutorial/essential/environment/paths.html
				https://docs.oracle.com/javase/8/docs/technotes/tools/windows/classpath.html

		*** If you want to execute the following commands just the same as on linux/unix/cygwin then create
   			appropriate batch files (already provided) in C:\linux-command-line and add this directory to
   			your system PATH environment variable (you might have already done this in the above step).

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jls: It is a subset of "ls" on linux/unix/cygwin.

* Usage: java jls [OPTION]... [FILE]...

         List information about FILES (the current directory by default).
            
         Options are listed below:
         
         -l        use a long listing format (enabled by default)
         -R        list subdirectories recursively
         --help    display this help and exit
            
Options can be listed together (ls -lR) or separetly (ls -l -R).

* ls.bat has been attached to execute "java jls" as "ls".

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jrm: It is a subset of "rm" on linux/unix/cygwin.

* Usage: java jrm [OPTION]... [FILE]...

         Remove the FILE(s).

         Options are listed below:

         -i        prompt before every removal (enabled by default)
         --help    display this help and exit
         
Directories cannot be deleted for now.

* rm.bat has been attached to execute "java jrm" as "rm".

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jmv: It is a subset of "mv" on linux/unix/cygwin.

* Usage: java jmv -i source_file target_file
         java jmv -i source_file target_folder
         java jmv  source_file target_file (Omitting -i option does not matter, -i will be forced)
         java jmv  source_file target_folder (Omitting -i option does not matter, -i will be forced)
         java jmv -help

Directories cannot be moved for now.
-i option will be forced if not present.
If target file is present then move operation will fail.
If target_folder\source_file exists then move operation will fail.

* mv.bat has been attached to execute "java jmv" as "mv".

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jcp: It is a subset of "cp" on linux/unix/cygwin.

* Usage: java jcp -i source_file target_file
         java jcp -i source_file target_folder
         java jcp  source_file target_file (Omitting -i option does not matter, -i will be forced)
         java jcp  source_file target_folder (Omitting -i option does not matter, -i will be forced)
         java jcp -help

Directories cannot be copied for now.
-i option will be forced if not present.
If target file is present then copy operation will fail.
If target_folder\source_file exists then copy operation will fail.

* cp.bat has been attached to execute "java jcp" as "cp".

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jcat: It is a subset of "cat" on linux/unix/cygwin.

* Usage: java jcat some_file
		   java jcat one_file second_file more_files
		   java jcat some_directory\some_file
		   java jcat some_file one_directory\one_file more_directories\more_file some_other_file
		   java jcat -help

jcat does not work on directories.

* cat.bat has been attached to execute "java jcat" as "cat".

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jgrep: It is a subset of "grep" on linux/unix/cygwin.

* Usage: java jgrep search_text some_file
         java jgrep "search_text more_search_text" some_file (If search text contains spaces then use quotes)
         java jgrep -i search_text some_file (for case insensitive search)
         java jgrep -i "search_text more_search_text" some_file

         java jgrep search_text some_file more_files
         java jgrep "search_text more_search_text" some_file more_files
         java jgrep -i search_text some_file more_files
         java jgrep -i "search_text more_search_text" some_file more_files

         java jgrep -r search_text some_dir (Search recursively)
         java jgrep -r "search_text more_search_text" some_dir
         java jgrep -i -r search_text some_dir (case insensitive recursive search)
         java jgrep -i -r "search_text more_search_text" some_dir
         java jgrep -r search_text some_dir more_dirs
         java jgrep -r "search_text more_search_text" some_dir more_dirs
         java jgrep -i -r search_text some_dir more_dirs
         java jgrep -i -r "search_text more_search_text" some_dir more_dirs

         java jgrep -r search_text some_file some_dir
         java jgrep -r "search_text more_search_text" some_file some_dir
         java jgrep -i -r search_text some_file some_dir
         java jgrep -i -r "search_text more_search_text" some_file some_dir
         java jgrep -r search_text some_file more_files some_dir more_dirs
         java jgrep -r "search_text more_search_text" some_file more_files some_dir more_dirs
         java jgrep -i -r search_text some_file more_files some_dir more_dirs
         java jgrep -i -r "search_text more_search_text" some_file more_files some_dir more_dirs

         some_command | java jgrep search_text (In absence of any file or directory, standard input is read and -r option is ignored if present)
                                               (In this case it will read the standard output of some_command which is the standard input for jgrep)
         some_command | java jgrep "search_text more_search_text"
         some_command | java jgrep -i search_text
         some_command | java jgrep -i "search_text more_search_text"

         java jgrep -help

Recursive search can be done using -r option.
-r option is ignored in case of a file.
-r option is supported, -R (capital r) is not supported.
Directory is omitted if -r option is not present.
List options separately like -i -r and not -ir.
In absence of any file or directory, standard input is read and -r option is ignored if present. So, you can pipe the output of some other program/command into jgrep.
You can mix options, files, and directories freely but appropriate options have to be present for correct search.
REGULAR EXPRESSIONS ARE SUPPORTED.

* grep.bat has been attached to execute "java jgrep" as "grep".

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jdiff: It is a subset of "diff" on linux/unix/cygwin.

* Usage: java jdiff [OPTION]... FILES

         Compare FILES line by line.
            
         Options are listed below:
         
         -i        ignore case differences in file contents
         --binary  read data in binary mode
         --help    display this help and exit

FILES are FILE1 FILE2.
If --binary option is present then -i option is ignored.
For now jdiff prints only whether FILES are identical or different.
Directories cannot be compared for now.

* diff.bat has been attached to execute "java jdiff" as "diff".

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