tar command
Purpose: to pack or unpack files
Format: tar [options] [file]
Table parameters and the role of the tar command
| parameter |
effect |
| -c |
Create a compressed file |
| -x |
Extract the file |
| -t |
What view files in the archive |
| -with |
Gzip compression or decompression with |
| -j |
Compression or decompression with bzip2 |
| -v |
Displaying the compression or decompression process |
| -f |
The destination file name |
| -p |
Preserve the original permissions and attributes |
| -P |
Use an absolute path to compress |
| -C |
Specify the directory to unzip |
Example:
Create a compressed file
Unzip the file
grep command
Uses: for text perform a keyword search, and displays the matching result
Format: grep [options] [file]
| parameter |
effect |
| -b |
The executable (binary) as a text file (text) search |
| -c |
Display only the number of lines found |
| -i |
Ignore case |
| -n |
Show Line Numbers |
| -v |
Invert Selection ---- not only lists the line "key words" in |
Example:
find command
Uses: used in accordance with the specified criteria to find files
Format: find [Search Path] Looking operating conditions
Table parameters and the role of the find command
| parameter |
effect |
| -name |
Matching name |
| -perm |
Matching permissions (mode can be included as an exact match -mode) |
| -user |
Matching owner |
| -group |
All group matches |
| -mtime -n +n |
Time matching the content of (-n to + n is within n days ago n) |
| -atime -n +n |
Matching file access time (-n to + n is within n days ago n) |
| -ctime -n +n |
Matching time modify the file (-n to + n is within n days ago n) |
| -nouser |
No matching file owner |
| -nogroup |
No matching files for all groups |
| -newer f1 !f2 |
But new match than f1 f2 than the old files |
| --type b/d/c/p/l/f |
Match the size of the file (parameter letters behind the order represented as a block device, directory, character device, pipe, link files, text files) |
| -size |
Match the size of the file (+ 50KB 50KB to look over the documents, and to find the file is less than 50KB -50KB a) |
| -prune |
Ignore a directory |
| -exec ...... {}\ |
Command can be followed by further treatment with search results for |
Example:
1. Get all the host at the beginning of the / etc directory list of files
2. Search the file permissions include all SUID privileges, you can just use -4000
3.在整个系统中找出所有归属于Linuxprobe用户的文件并复制到/root/findresult目录下
