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, such as vi/etc/hosts, copy/etc/hosts to/bak/etc/hosts.

# Cat/sh/vii

#! /Usr/bin/bash

# Check whether the source file exists before performing the backup operation

If [-f "$1"]; then

# Create a function to enable any key to continue

# If stty raw is not recognized on your machine, replace the raw in the two parts of the function with cbreak.

Get_char ()

{

SAVEDSTTY = 'stty-G'

Stty-echo

Stty raw

Dd if =/dev/tty bs = 1 count = 1 2>/dev/null

Stty-raw

Stty echo

Stty $ SAVEDSTTY

}

# Create the backup root path/bak and grant everyone the write permission

If [! -D "/bak"]; then

Mkdir/bak

Chmod a + w/bak

Fi

# Determine the path of the target file and create it so that everyone has the write permission on any newly created level directory.

Echo $1 | grep "/">/dev/null

If ["'echo $? '"=" 0 "]; then

Cd $ {1% /*}

Fi

Pwdnow = 'pwd'

Path =/bak $ {pwdnow}

# Echo $ path

If [! -D "$ path"]; then

Mkdir-p $ path

Patha =$ {pwdnow #/}

Chmod-R a + w/bak/$ {patha % /*}

Fi

# Copying the target file

Datenow = 'date + % Y % m % d'

Timenow = 'date + % H % M % s'

/Usr/bin/cp $1 $ {path}/$ {1 # */}. $ {datenow}. $ {timenow}

Echo "Target file \" $1 \"

Has been copied to $ {path}/$ {1 # */}. $ {datenow}. $ {timenow }"

Echo "Now going to \" vi $1 \ ", Press any key to continue ..."

Char = 'get _ char'

Fi

# Call the vi command

Vi $1

Call scripts

# Chmod a + x/sh/vii

#/Sh/vii/etc/passwd

You can add/sh to the path variable for convenience.

Likewise, it is best to back up the target file when the cp/mv command is involved to avoid accidental overwrite.