103.3 Perform basic file management

Introduction
1. Everything in Linux is a file,
  1. copy files
  2. delete files
  3. cover the commands associated with file management.
  4. A file is an entity that stores data and programs.
    1. consists of content and meta data
      1. file size, owner, creation date, permissions
  5. types of files
    1. Regular files
    2. Directories
    3. Special files
Manipulating Files
1. Using ls to List Files
  1. ls
    1. -l
      1. -,:Regular file d,: directory file l: lnk file
    2. -lh
      1. human
    3. -a
      1. hidden files
2. Creating, Copying, Moving and Deleting Files
  1. Create File
    1. touch file1 file2 file3
    2. touch -am file3
      1. -a option changes only the access time, while the -m option changes only the modification time.
3. Copying Files with cp
  1. cp file1 dir2
4. Moving Files with mv
  1. mv myfile.txt /home/frank/Documents
    1. mv old_file_name new_file_name
  2. -i: interactive -f:forza
5. Deleting Files with rm
  1. rm file1
    1. rm -i file1
      1. rm -f file1
        rm file1 file2 file3
Creating and Deleting Directories
1. Creating Directory
  1. mkdir dir1
    1. mkdir dir1 dir2 dir3
      1. mkdir -p parents/children
Removing Directories
1. rmdir dir1
  1. rmdir dir1 dir2
    1. rmdir -p parents/children
Recursive Manipulation of Files and Directories
1. ls -R mydirectory
  1. ls -R animal
    1. ls -R animal/
Recursive Copy with cp -r
1. tree mydir
2. mkdir newcopy
3. cp -r mydir newcopy
  1. -r all the contents of mydir including itself are copied into newcopy.
4. Recursive Deletion with rm -r
  1. rm newcopy/
    1. rm -ri mydir/
      1. Recursive Interactive
File Globbing and Wildcards
1. file globing
  1. File globbing is a feature provided by the Unix/Linux shell to represent multiple filenames by using special characters called wildcards.
2. Wildcards
  1. are essentially symbols which may be used to substitute for one or more characters
    1. *
      1. rm *: Delete all files in current working directory.
    2. ?
      1. ls l?st
        List all files with names beginning with l followed by any single character and ending with st.
    3. []
      1. rmdir [a-z]*
        Remove all directories whose name starts with a letter.
3. The Asterisk
  1. find /home -name *.png
  2. ls lpic-*.txt
  3. cp -r animal/* forest
  4. rm *ate*
  5. The Question Mark
    1. ls l?st.txt
    2. ls ??st.txt
    3. Bracketed Characters
      1. ls l[aef]st.txt
      2. ls l[a-z]st.txt
      3. ls student-[0-9][A-Z].txt
      4. Combining Wildcards
        ls [plf]?st*
        ls f*[0-9]+.txt
Guide Exercises
1. touch dog cat
2. mkdir animal
  1. mv dog cat -t animal/
3. cd ~/Documents
  1. mkdir backup
    1. cp -r animal ~/Documents/backup
      1. mv animal/ animal.bkup
4. ls db-[1-3].tar.gz
5. rm cne*.pdf

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103.3 Perform basic file management

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