Linux Script - Useful Ones

[Tested in cygwin]

1. Find Strings in the Dir.
     find [Dir Path] -type f -name "*.[FileTypePostFix]" | xargs grep "[search string]" -bn --color=auto
     e.g.
     find . -type f -name "*.substvar" | xargs grep "P1O1" -bn --color=auto

2. Copy the Dir Structure under specific Dir (auto creates all the non-exist dirs)
   
    Instruction:
    XCOPY <<SourceFolder>> <<Destination>> /O /X /E /H /K /T
    /E - Copies folders and subfolders, including empty ones.
    /H - Copies hidden and system files also.
    /K - Copies attributes. Typically, Xcopy resets read-only attributes.
    /O - Copies file ownership and ACL information.
    /X - Copies file audit settings (implies /O).
    /T : Copies the subdirectory structure (that is, the tree) only, not files 
           (To copy empty directories, you must include the /e command-line option.)
 
   Ex: 
   xcopy C:\temp D:\temp /O /X /E /H /K /T  
   It copies all the dir structure under C:\temp to D:\temp

3. Remove dup-record in the file
    sort -u input.txt > output.txt

4. Find specific file
     find . -type f -name '*.xml'
  
5. Find file numbers in dir and sub dir
     find . -type f |wc -l

6. list all dirs:
     find . -type d

7. Remove Files Postfix
    find -type f -name '*.temp' -print0 | while read -d $'\0' f; do mv "$f" "${f%.temp}"; done