Bombe "Linux" bird Brother's Linux private cuisine basic study finishing (iii)

1. gzip [-cdtv#] FileName: compression.
Parameters:
-C: Output compressed data to the screen, can be processed by data redirection;
-D: the extracted parameters;
-T: can be used to verify the consistency of a compressed file, to see if the file is error-free;
-V: can display the original file/compressed file compression ratio and other information;
-#: Compression level, 1 fastest (compression ratio worst), 9 slowest (compression ratio is best), default 6.

2. Zcat *.gz: Read the gzip compressed file.

3. bzip2 [-cdkzv#] FileName: compression.
Parameters:
-C: Output the data generated during the compression process to the screen;
-D: the extracted parameters;
-K: retains the original file without deleting the original file;
-Z: Compression parameters;
-V: can display the original file/compressed file compression ratio and other information;
-#: Compression level, 9 best, 1 worst.

4. Bzcat *.bz2: Reads the bzip2 compressed file.

5. Tar [-j|-z] [CVXT] [-f new filename] FileName: package.
Parameters:
-C: New package file, can be paired with-V to see the process of the file name of the package;
-T: View the contents of the packaged file with which file names, focusing on viewing the file name;
-X: Unpack or unzip the function, can be used with-C in a specific directory to solve;
-c,-t,-x cannot appear in the same command at the same time.
-J: Compression/Decompression through the support of bzip2, at this time the file name is preferably *.tar.bz2;
-Z: Compression/Decompression through GZIP support, at this time the file name is preferably *.tar.gz;
-V: During the compression/decompression process, the processing progress is displayed;
-F FileName: Specifies the newly created file name;
-C Directory: Specify the directory when extracting;
-P: Retains the original permissions and properties of the backup data, often used to back up the important configuration file of-C;
-P: Retains absolute path, that is, allows the backup data to contain the root directory;
--exclude=file: In the process of compression, do not say FILE packaging.

6. Dump [-SUVJ] [-level] [-F backup file name] data to be backed up: backup.
Parameters:
-S: Lists only how much disk space is required to back up the data to be backed up;
-U: Log the time of this dump to the/etc/dumpdates file;
-V: Displays the file process of the dump;
-J: Add the support of bzip2, compress the data, the default compression level is 2;
-level: Specifies the compression level;
-F: Specify the target file name;
-W: Lists whether the partition with the dump setting in/etc/fstab has been backed up.

7. Restore-t [-F DumpFile] [-h]: View dump file.
Restore-c [-F dumpfile] [-D mount Point]: Compare the dump file with the actual file.
Restore-i [-F DumpFile]: Enter interactive mode.
Restore-r [-F DumpFile]: Restores the entire file system.
Parameters:
-T: Used to view important data in the dump file;
C: Compare the contents of the dump file with the actual file;
-I: Enter the interactive mode, you can restore only some files, used in the dump directory when the restore;
-R: Restore the entire file system;
-H: View the Inode and File system label information in the full backup data;
-F: Specifies the dump file to be processed;
-D: View the different data contained in the mount point and the dump file.

8. Mkisofs [-o image file] [-RV] [-M file] with backup file [-V Vol]: Create a new image file.
Parameters:
-O: Specifies the target image file name;
-r: Generate supporting Unix/linux file data through Rock Ridge, can record more data;
-V: Displays the process of building the image file;
-m file: excludes files;
-V Vol: New volume.

9. DD if= "input file" of= "Output File" bs= "Block Size" count= "number": Backup.
Parameters:
If: Specify input file, or it can be a device name;
Of: Specifies the output file, or the device name;
BS: Plan a block size, default is 512 bytes (a sector size);
Count: Specifies the number of blocks.

Cpio [-OVCB] > [File|device]: Backup.
Cpio [-IVCDU] > [File|device]: Restore.
Cpio [-IVCT] > [File|device]: view.
Cpio is backed up and restored through federated commands such as find.
Parameters:
-O: Copy the data to a file or device;
-B: Increase the default block size to 5120 bytes, and default to 512 bytes;
-I: Copy the data from the file or device into the system;
-D: Automatically create a new directory, the data that is backed up using cpio is not necessarily in the same level of directory;
-U: Automatically overwrites newer files with older ones;
-T: With the-i parameter, you can view the contents of the new file or device cpio;
-V: Displays the file name that appears in the store;
-C: A newer portable format store.