Linux学习总结（11）——Linux文件查找

Linux下的常用查找命令

• locate
• whereis
• which
• find

locate 
-i, 忽略大小写 

find 
根据文件名或正则表达式搜索 
-name 
 
条件限制 
-a 与条件 
-o 或条件 
-not 非条件（此参数的功能类似于否定参数‘!’）

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"t*"</span> <span class="hljs-attribute" style="box-sizing: border-box;">-a</span> <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"*.text"</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找以t开头并且以.text结尾的文件</span>
find <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"t*"</span> <span class="hljs-attribute" style="box-sizing: border-box;">-o</span> <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"*.text"</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找以t开头或以.text结尾的文件</span>
find <span class="hljs-attribute" style="box-sizing: border-box;">-not</span> <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"t*"</span> <span class="hljs-attribute" style="box-sizing: border-box;">-o</span> <span class="hljs-attribute" style="box-sizing: border-box;">-name</span> <span class="hljs-string" style="box-sizing: border-box;">"*.text"</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找不以t开头或以.text结尾的文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul>

 
设定find命令在子目录中遍历的深度参数： 
-maxdepth 
-mindepth 
根据文件类型搜索：

类型	符号
普通文件	f
符号文件	l
目录	d
字符设备	c
块设备	b
套接字	s
管道文件	p

<code class="hljs fsharp has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find -<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="box-sizing: border-box;">type</span> <span class="hljs-title" style="box-sizing: border-box;">l</span>  //查找此目录及子目录以下的所有符号文件</span>
find -<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="box-sizing: border-box;">type</span> <span class="hljs-title" style="box-sizing: border-box;">f</span>  //普通文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul>

根据文件时间进行查找： 
linux文件系统中的每个文件都有三种时间戳： 
1. 访问时间（atime——access time）：就是上次访问这个文件的时间。 
2. 改变时间（ctime——change time）：就是文件的inode改变的时间（什么是inode？）当你往一个文件中添加数据或者删除数据的时候，修改文件所有者的时候，链接改变的时候，文件的ctime就会发生改变。 
3. 修改时间（mtime——modification time）：就是文件的内容上一次发生改变的时候的时间。

<code class="hljs fsharp has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find -<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="box-sizing: border-box;">type</span> <span class="hljs-title" style="box-sizing: border-box;">f</span> -<span class="hljs-title" style="box-sizing: border-box;">atime</span> -7   #查找7天内被访问的文件</span>
find -<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="box-sizing: border-box;">type</span> <span class="hljs-title" style="box-sizing: border-box;">f</span> -<span class="hljs-title" style="box-sizing: border-box;">atime</span>  7   #查找恰好在7天前被访问的文件</span>
find -<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="box-sizing: border-box;">type</span> <span class="hljs-title" style="box-sizing: border-box;">f</span> -<span class="hljs-title" style="box-sizing: border-box;">atime</span> +7   #查找超过7天没被访问的文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul>

-atime，-ctime，-mtime可作为find的时间参数，单位是天。还有基于“分钟”的，-amin，-mmin 
-cmin。这些值通常还带有+或-：+表示大于，-表示小于。 
-newer参数，我们可以指定一个用于比较时间戳的参考文件，然后找出比参考文件更新的所有文件。 

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-newer</span> test4  <span class="hljs-comment" style="box-sizing: border-box;">//查找当前目录及子目录下比test4更新的文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li></ul>

基于文件大小的查找 
-size参数 

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-size</span> <span class="hljs-subst" style="box-sizing: border-box;">+</span><span class="hljs-number" style="box-sizing: border-box;">45</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找文件大小比45大的普通文件</span>
find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-size</span>  <span class="hljs-number" style="box-sizing: border-box;">45</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找文件大小为45的普通文件</span>
find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-size</span> <span class="hljs-subst" style="box-sizing: border-box;">-</span><span class="hljs-number" style="box-sizing: border-box;">45</span>  <span class="hljs-comment" style="box-sizing: border-box;">//查找文件大小比45小的普通文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">3</span></li></ul>

基于文件权限和文件所有人的查找 
-perm 
-user 

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-perm</span> <span class="hljs-number" style="box-sizing: border-box;">664</span>   <span class="hljs-comment" style="box-sizing: border-box;">//查找权限为664的普通文件</span>
find <span class="hljs-attribute" style="box-sizing: border-box;">-type</span> f <span class="hljs-attribute" style="box-sizing: border-box;">-user</span> lee   <span class="hljs-comment" style="box-sizing: border-box;">//查找所有人为lee的普通文件</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul>

结合find执行命令或动作 
-exec

<code class="hljs mel has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find -type f -name <span class="hljs-string" style="box-sizing: border-box;">"*.c"</span> -<span class="hljs-keyword" style="box-sizing: border-box;">exec</span> cat> <span class="hljs-keyword" style="box-sizing: border-box;">file</span>.txt ;  #将所有.c文件拼接起来写入单个文件<span class="hljs-keyword" style="box-sizing: border-box;">file</span>.txt中
find -type f -mtime +<span class="hljs-number" style="box-sizing: border-box;">10</span> -name <span class="hljs-string" style="box-sizing: border-box;">"*.text"</span> -<span class="hljs-keyword" style="box-sizing: border-box;">exec</span> cp /<span class="hljs-number" style="box-sizing: border-box;">5</span>_15   #将<span class="hljs-number" style="box-sizing: border-box;">10</span>天前的.<span class="hljs-keyword" style="box-sizing: border-box;">text</span>文件复制到/tmp下</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute;  50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right- 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">1</span></li><li style="box-sizing: border-box; padding: 0px 5px;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">2</span></li></ul>

find与xargs结合使用 
xargs参数 将标准输入转换成命令行参数 

<code class="hljs bash has-numbering" style="display: block; padding: 0px; box-sizing: border-box; white-space: pre; border-radius: 0px; word-wrap: normal; background-image: initial; background-attachment: initial; background-color: transparent; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;"><span style="font-family:Courier New;font-size:18px;color:#ff0000;">find -type f -name <span class="hljs-string" style="box-sizing: border-box;">"*.txt"</span> -print0 |xargs  -<span class="hljs-number" style="box-sizing: border-box;">0</span> rm <span class="hljs-operator" style="box-sizing: border-box;">-f</span>   <span class="hljs-comment" style="box-sizing: border-box;">#将匹配到的文件删除，xargs -0将 作为输入定界符。</span>
find -type f -name <span class="hljs-string" style="box-sizing: border-box;">"*.c"</span> -print0 | xargs  -<span class="hljs-number" style="box-sizing: border-box;">0</span> <span class="hljs-operator" style="box-sizing: border-box;">-l</span>     <span class="hljs-comment" style="box-sizing: border-box;">#统计所有c程序文件的行数</span></span></code>