Use Shell scripts to automatically back up source files before vi, cp, and mv.

The following script backs up all source files to be edited to the bak directory, and keeps all paths unchanged. for example, vietchosts copies etchosts to baketchosts. Ca

The following script backs up all source files to be edited to the/bak directory, and keeps all paths unchanged, such as vi/etc/hosts, copy/etc/hosts to/bak/etc/hosts.

1. # Cat/sh/vii
2. #! /Usr/bin/bash
3. # Check whether the source file exists before performing the backup operation
4. If [-f "$1"]; then
5. # Create a function to enable any key to continue
6. # If stty raw is not recognized on your machine, replace the raw in the two parts of the function with cbreak.
7. Get_char ()
8. {
9. SAVEDSTTY = 'stty-G'
10. Stty-echo
11. Stty raw
12. Dd if =/dev/tty bs = 1 count = 1 2>/dev/null
13. Stty-raw
14. Stty echo
15. Stty $ SAVEDSTTY
16. }
17. # Create the backup root path/bak and grant everyone the write permission
18. If [! -D "/bak"]; then
19. Mkdir/bak
20. Chmod a + w/bak
21. Fi
22. # Determine the path of the target file and create it so that everyone has the write permission on any newly created level Directory.
23. Echo $1 | grep "/">/dev/null
24. If ["'echo $? '"=" 0 "]; then
25. Cd $ {1% /*}
26. Fi
27. Pwdnow = 'pwd'
28. Path =/bak $ {pwdnow}
29. # Echo $ path
30. If [! -D "$ path"]; then
31. Mkdir-p $ path
32. Patha =$ {pwdnow #/}
33. Chmod-R a + w/bak/$ {patha % /*}
34. Fi
35. # Copying the target file
36. Datenow = 'date + % Y % m % d'
37. Timenow = 'date + % H % M % s'
38. /Usr/bin/cp $1 $ {path}/$ {1 # */}. $ {datenow}. $ {timenow}
39. Echo "Target file" $1"
40. Has been copied to $ {path}/$ {1 # */}. $ {datenow}. $ {timenow }"
41. Echo "Now going to" vi $1 ", Press any key to continue ..."
42. Char = 'get _ char'
43. Fi
44. # Call the vi command
45. Vi $1
46. Call scripts
47. # Chmod a + x/sh/vii
48. #/Sh/vii/etc/passwd

You can add/sh to the PATH variable, which is more convenient. Likewise, it is best to back up the target file when the cp/mv command is involved to avoid accidental overwriting.