Linux file Management-related commands

Linux file Management-related commands

• View of File metadata (properties of the file itself)

  • Stat: Get metadata for the specified file

      $ stat test file: ' Test ' size:0 B locks:0 IO block:4096 Regular empty file device:802h/2050d inode:651942 links:1 Access: (0664/-r w-rw-r--) Uid: (500/centos) Gid: (500/centos) access:2018-08-03 21:57:38.527860605-0700 modify:2018-08-03 21:57:38.527860605-0700 change:2018-08-03 21:57:38.527860605-0700  

    • access:2018-08-03 21:5 7:38.527860605-0700 refers to the time the file was accessed
    • modify:2018-08-03 21:57:38.527860605-0700 refers to the time the file was modified
    • change:201 8-08-03 21:57:38.527860605-0700 refers to file change time

  • File: File content Type view command
    File/path/to/somewhere

      ' $ file test.txt test.txt:ASCII text '  

• Text File View commands

  • Cat [OPTION] ... [File] ...: Link and display text file

    • Option
      • -E: Display line terminator
      • -T: Show tabs
      • -N: Numbering each line displayed

    [[email protected] Downloads]$ cat test.txt 109876[[email protected] Downloads]$ cat test2.txt 54321[[email protected] Downloads]$ cat test.txt test2.txt 109876   54321

  • More [OPTIONS ...] FILE
    • Option
      • -D: Flip and exit Tips
    • Use the same as man but can't page forward

  • Less [OPTIONS ...] FILE

    • More powerful than more can page forward, using the same as man (the man is called less)
  • Head [OPTION] ... FILE
    • Option
      • -C #: Specifies the contents of the before # bytes obtained
      • -N #: Specifies the first # line to get
  • tail [OPTION] ... [FILE] ...
    • -Just the opposite of head.
    • -F: Trace displays new additions to the file
• Time Stamp management tool for files
  • Three time stamps
    • Access time: atime, reading file contents
    • Modify Time: Modify Mtime, change file contents
    • Change time: Changing CTime, metadata changes
  • Touch [OPTION] ... FILE ...
    • Option
      • -A: Change access time only

          [[email protected] downloads]# stat-c%x\n test2.txt 2018-08-03 22:26:53.148443735-0700n[[email protected] downloads]# touch-a test2.txt [[email protected] Downloads]# Stat-c%x\n test2.txt 2018-08-04 01:03:40.197146110-0700n  

      • -M: Change only modification time and change time

          [[EMAIL&N Bsp;protected] downloads]# stat-c%y test2.txt 2018-08-03 22:26:08.781013024-0700[[email protected] Downloads]# Touch-m test2.txt [[email protected] downloads]# stat-c%y test2.txt 2018-08-04 01:07:48.250958279-0700  
         

      • -T: Specify a specific time [[cc]yy]mmddhhmm[]. SS]

          [[email protected] downloads]# stat-c%y test2.txt 2018-08-04 01:09:34.094912552-0700[[email   protected] downloads]# touch-mt 201404052330.50 test2.txt [[email protected] downloads]# stat-c%y test2.txt 2014-04-05 23:30:50.000000000-0700  

      • -C: Do not create if the file does not exist

Linux file Management-related commands