Linux 比较文件的日期 bash
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compare file's date bash
提问by Wael hamada
I'm working on a tiny dropbox-like bash script, how can I compare the dates of 2 files and replace the old one(s) with the new one without using rsyncis there any simple way to process this? can the SHA1help me with knowing the newer?
我正在开发一个类似于 dropbox 的 bash 脚本,如何比较 2 个文件的日期并将旧文件替换为新文件而不使用rsync有没有简单的方法来处理这个问题?SHA1可以帮助我了解更新吗?
采纳答案by Anton Kovalenko
You can compare file modification times with test
, using -nt
(newer than) and -ot
(older than) operators:
您可以test
使用-nt
(newer than) 和-ot
(older than) 运算符将文件修改时间与, 进行比较:
if [ "$file1" -ot "$file2" ]; then
cp -f "$file2" "$file1"
fi
回答by Kent
how about
怎么样
stat file|awk -F': ' '/Modify: /{print }'
回答by whatever4711
Or even shorter and nicer, look at man stat
:
或者甚至更短更好,看看man stat
:
stat -c %y file
回答by Steven Penny
Here is a POSIX solution:
这是一个POSIX解决方案:
find -name file2 -newer file1