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Tags: command-line   cp   ms-dos  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

URL: https://askubuntu.com/q/1153995
Title: Copy group of files (Filename*) to backup (Filename*.bak)
ID: /2019/06/26/Copy-group-of-files-_Filename*_-to-backup-_Filename*.bak_
Created: June 26, 2019    Edited:  June 27, 2019
Upload: November 24, 2022    Layout:  post
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I wrote this one-liner into my ~/.bashrc. Much better answers using find can be posted I suppose. Even better answers could be written in in C. Hopefully this Q&A gets the ball rolling for better answers:

cps () {
    # cps "Copy Splat", copy group of files to backup, ie "cps Filename .bak"
    # Copies Filename1 to Filename1.bak, Filename2 to Filename2.bak, etc.
    # If Filename1.bak exists, don't copy it to Filename1.bak.bak
    for f in "$1"*; do [[ ! "$f" == *"$2" ]] && cp -a "$f" "$f$2"; done

    # OLD version comments suggested to remove 
    # ls "$1"* | while read varname; do cp -a "$varname" "$varname$2"; done
}


cps gmail-meta3 .bak Sample Output

Using the question as an example here is how it looks in action:

───────────────────────────────────────────────────────────────────────────────────────────
rick@alien:~/gmail$ ll gmail-meta3*
-rw-rw-r-- 1 rick rick 26467821 May 20 16:43 gmail-meta3
-rw-rw-r-- 1 rick rick 26467821 May 20 16:43 gmail-meta3.bak
-rw-rw-r-- 1 rick rick      643 May 20 16:43 gmail-meta3-LAB-1558392194-26467821
-rw-rw-r-- 1 rick rick      643 May 20 16:43 gmail-meta3-LAB-1558392194-26467821.bak
-rw-rw-r-- 1 rick rick    49607 May 20 16:44 gmail-meta3-REC-1558392194-26467821
-rw-rw-r-- 1 rick rick    49607 May 20 16:44 gmail-meta3-REC-1558392194-26467821.bak
-rw-rw-r-- 1 rick rick   728954 Jun 27 17:04 gmail-meta3-YAD-1558392194-26467821
-rw-rw-r-- 1 rick rick   728954 Jun 27 05:46 gmail-meta3-YAD-1558392194-26467821.bak
───────────────────────────────────────────────────────────────────────────────────────────
rick@alien:~/gmail$ cps gmail-meta3 .bak
───────────────────────────────────────────────────────────────────────────────────────────
rick@alien:~/gmail$ ll gmail-meta3*
-rw-rw-r-- 1 rick rick 26467821 May 20 16:43 gmail-meta3
-rw-rw-r-- 1 rick rick 26467821 May 20 16:43 gmail-meta3.bak
-rw-rw-r-- 1 rick rick      643 May 20 16:43 gmail-meta3-LAB-1558392194-26467821
-rw-rw-r-- 1 rick rick      643 May 20 16:43 gmail-meta3-LAB-1558392194-26467821.bak
-rw-rw-r-- 1 rick rick    49607 May 20 16:44 gmail-meta3-REC-1558392194-26467821
-rw-rw-r-- 1 rick rick    49607 May 20 16:44 gmail-meta3-REC-1558392194-26467821.bak
-rw-rw-r-- 1 rick rick   728954 Jun 27 17:04 gmail-meta3-YAD-1558392194-26467821
-rw-rw-r-- 1 rick rick   728954 Jun 27 17:04 gmail-meta3-YAD-1558392194-26467821.bak
───────────────────────────────────────────────────────────────────────────────────────────
rick@alien:~/gmail$ 

Note: This uses the -a flag with the cp command to preserve timestamps and give you better grasp of your file backups.

Notice how the file copies have the exact same date and time as the originals. If the -a parameter was omitted they would be given the current date and time and wouldn’t look like a true backup except that the file size would be the same.

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