Renaming file command in unix

Directories are analogous to Macintosh and Windows folders. Each file and directory has a name. Within a directory, each item that is, each file or directory must have a unique name, but items with the same name may exist in more than one directory. A directory may have the same name as one of the items it contains. File and directory names may be up to characters long.

Names may use almost any character except a space. Some characters have special meanings to Unix. It is best to avoid using these characters in file names:. Unix is case-sensitive. Terminate file entry by typing Control-d on a line by itself. Hold down the Control key and type d. On your screen, you will see:. To make a duplicate copy of a file, use the command cp.

For example, to create an exact copy of the file called firstfile, you would type:. This results in two files with different names, each containing the same information. The cp command works by overwriting information.

If you create a different file called thirdfile and then type the following command:. Unix does not have a command specifically for renaming files. Instead, the mv command is used both to change the name of a file and to move a file into a different directory. Note that the renaming command is called perl-rename. The first part is the command name, rename or prename or perl-rename , for the other distributions.

The middle part defines the work we want to be done on each filename. The s means substitute. The first term. In the directory are a lot of C source code files.

We can check this with ls. The format of the command is already familiar to us. We can check the result of that command by repeating the ls command from above with the same parameters:.

The rename command follows the same format as before. Two backslashes without anything between them means nothing, an empty string. If it is found, it will be replaced by nothing. In other words, the search term is deleted.

The second use of the ls command shows us that that is exactly what has happened. Metacharacters are symbols that represent positions or sequences of characters. Renaming file and check for the renamed file existence. Hi Am trying to move a file from one name to another When I do "ls" to check for the moved filename I can see the file but when I try the same with a script am unable.. I think am doing some pretty silly error.. I need to rename those files to a. I need to do this in a one liner.

Hey folks My problem is simple. The 2nd time around, I changed the naming convention File renaming from list of names contained in another file. I have to rename a large number of files so that the name of each file corresponds to a code number that is given side by side in a list textfile.

The list contains in column A the filename of the actual files to be renamed and in column B the name a client code, 9 digits that has to be Renaming a file use another file as a sequence calling a shl. Renaming a file. I am a complete Unix newbie and I need some help! Dear Friends, Need your help once again. I have this file name e. This command will move a file to a different directory, change its name and leave it in place, or do both. Explanation: who command output the details of the users who are currently logged in to the system.

The output includes username, terminal name on which they are logged in , date and time of their login etc. This block will process if specified condition is true. If specified condition is not true in if part then else part will be execute. To use multiple conditions in one if-else block, then elif keyword is used in shell.