如何删除(n)天以上的文件,而又不考虑其年龄而保留(n)个文件? [英] How can I delete files over (n) days old but leave (n) files regardless of age?
问题描述
我用PHP写了以下内容,但我想知道在Linux Shell脚本中是否有一种优雅的方法?基本上删除(n)天以上的文件,但不考虑年龄限制,保留(n)个最新文件.
I wrote the following in PHP but I was wondering if there is an elegant way to do this in a Linux shell script? Basically delete files over (n) days old, but leave the (n) newest files regardless of age.
PHP
foreach (glob("backup/*.db") as $file) {
$a[$file]=date("Y-m-d",filemtime($file));
}
$i=0;
arsort($a);
foreach($a as $file=>$date) {
if ($i++>=10) {
if ($date<=date("Y-m-d",strtotime("-10 days"))) {
unlink($file);
xmessage("PURGED: $file");
}
}
}
我的想法是使用"find -mtime +(n)exec rm"删除但仅管道输入不在"head -n +(n)"中的文件?但是"head -n"表示似乎并没有达到我的预期.谢谢.
My idea was to delete with "find -mtime +(n) exec rm" but only pipe in the files that are NOT in "head -n +(n)"? But "head -n" does not seem to do what I thought it would. Thanks.
SHELL SCRIPT
find -mtime +10 | ls -t *.DB.tar.gz | head -n -10
推荐答案
尝试使用所有GNU find,sort,awk和xargs:
Try this using all GNU find, sort, awk, and xargs:
find . -type f -printf '%Ts %p\0' |
sort -k1,1nr -sz |
awk -v days=10 -v cnt=10 '
BEGIN { RS=ORS="\0"; secs=systime()-(days*24*60*60) }
(NR>cnt) && ($1>secs) { print gensub(/\S+\s+/,"",1) }
' |
xargs -0 ls --
在完成测试并确保已提供预期的输出后,将 ls
更改为 rm
.
Change ls
to rm
when you're done testing and sure it's giving you the expected output.
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