I want to back up the newly added files in a folder. That is, first compare which files in the target folder have not been backed up, and then back up the new files. How should this code be written呀:lol::lol:
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中国DOS联盟论坛 » DOS疑难解答 & 问题讨论 （解答室） » Differential backup of files
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Original Poster
Posted 2006-08-17 08:40 · 中国 四川 德阳 什邡市 电信
Floor 2
Posted 2006-08-17 11:59 · 中国 四川 德阳 什邡市 电信
Is there any big brother who knows how to do it?
Floor 3
Posted 2006-08-17 14:29 · 中国 四川 成都 鹏博士宽带
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The description is not specific enough to write specific code. Such posts should be transferred to the Batch Processing Room.
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Floor 4
Posted 2006-08-17 15:08 · 中国 四川 德阳 什邡市 电信
In folder A, there are: 1.TXT, 2.TXT, 3.TXT. In folder B, there are: 1.TXT, 2.TXT. I want to compare the files in folders A and B, and copy the newly added 3.TXT to folder B.
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Posted 2006-08-17 17:24 · 中国 四川 成都 鹏博士宽带
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```
@echo off
cd /d "Folder A"
for %%i in (*.txt) do (
if not exist "Folder B\%%i" copy "%%i" "Folder B">nul 2>nul
)
explorer "Folder A"
explorer "Folder B"
```
[ Last edited by namejm on 2006-8-18 at 14:41 ]
@echo off
cd /d "Folder A"
for %%i in (*.txt) do (
if not exist "Folder B\%%i" copy "%%i" "Folder B">nul 2>nul
)
explorer "Folder A"
explorer "Folder B"
```
[ Last edited by namejm on 2006-8-18 at 14:41 ]
尺有所短，寸有所长，学好CMD没商量。
考虑问题复杂化，解决问题简洁化。
考虑问题复杂化，解决问题简洁化。
Floor 6
Posted 2006-08-18 14:36 · 中国 四川 德阳 什邡市 电信
Floor 7
Posted 2006-08-18 14:56 · 中国 四川 德阳 什邡市 电信
If the folder A is to be changed to a network path, it is \\192.168.1.1\F$\文件夹A
Floor 8
Posted 2006-08-18 16:07 · 中国 四川 成都 鹏博士宽带
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I don't know much about network commands, and I don't have the conditions to test them. Still, please ask the experts to take action.
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考虑问题复杂化，解决问题简洁化。
Floor 9
Posted 2006-09-07 05:54 · 中国 福建 三明 电信
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xcopy \\192.168.1.1\F$\文件夹A L:\ /s /d /y /c >new_copy.log
/S Copies directories and subdirectories, excluding empty ones.
/D:m-d-y Copies files changed on or after the specified date. If no date is given, copies only files where the source time is newer than the destination time.
/Y Suppresses prompting to confirm overwriting an existing destination file.
/C Continues copying even if there are errors.
new_copy.log will record the files you copy each time
/S Copies directories and subdirectories, excluding empty ones.
/D:m-d-y Copies files changed on or after the specified date. If no date is given, copies only files where the source time is newer than the destination time.
/Y Suppresses prompting to confirm overwriting an existing destination file.
/C Continues copying even if there are errors.
new_copy.log will record the files you copy each time
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