blocks|key|1203663|text|使用wc+(GNU+coreutils)+7.4：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1203664|wc+-L+filename|code-block|syntax|javascript|1203665|提供：|1203666|101+filename|1203667|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Using wc (GNU coreutils) 7.4:

<pre><code>wc -L filename
</code></pre>

gives:

<pre><code>101 filename
</code></pre>

blocks|key|1203514|text|awk+'{print+length,+$0}'+Input_file+%7Csort+-nr%7Chead+-1|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1203515|参考：Finding+the+longest+line+in+a+file|unstyled|offset|length|1203516|entityMap|0|LINK|mutability|MUTABLE|url|http://wtanaka.com/node/7719^0|0|3|Y|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@$G|S|H|T|1|U]]|A|$]]|$1|I|3|-4|5|F|7|V|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P]]]]

<pre><code>awk '{print length, $0}' Input_file |sort -nr|head -1
</code></pre>

For reference : <a href="http://wtanaka.com/node/7719" rel="noreferrer">Finding the longest line in a file</a>

blocks|key|1203509|text|awk+'{+if+(length($0)+>+max)+{max+=+length($0);+maxline+=+$0}+}+END+{+print+maxline+}'++YOURFILE+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1203510|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>awk '{ if (length($0) &gt; max) {max = length($0); maxline = $0} } END { print maxline }' YOURFILE 
</code></pre>

blocks|key|1418833|text|wc+-L+<+filename|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1418834|给出|unstyled|1418835|101|1418836|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>wc -L &lt; filename
</code></pre>

gives

<pre><code>101
</code></pre>

blocks|key|1203851|text|perl+-ne+'print+length()."++line+$.++$_"'+myfile+%7C+sort+-nr+%7C+head+-n+1|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1203852|打印最长行的长度、行号和内容|unstyled|1203853|perl+-ne+'print+length()."++line+$.++$_"'+myfile+%7C+sort+-n|1203854|打印所有行的排序列表，包括行号和长度|1203855|.是连接运算符-此处在length()之后使用|offset|length|style|CODE|1203856|$.是当前行号|1203857|$_是当前行|1203858|entityMap^0|0|0|0|0|0|1|0|0|2|0|0|2|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@$M|11|N|12|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|F|7|13|8|@$M|14|N|15|O|P]]|9|@]|A|$]]|$1|S|3|T|5|F|7|16|8|@$M|17|N|18|O|P]]|9|@]|A|$]]|$1|U|3|-4|5|F|7|19|8|@]|9|@]|A|$]]]|V|$]]

<pre><code>perl -ne 'print length()." line $. $_"' myfile | sort -nr | head -n 1
</code></pre>

Prints the length, line number, and contents of the longest line

<pre><code>perl -ne 'print length()." line $. $_"' myfile | sort -n
</code></pre>

Prints a sorted list of all lines, with line numbers and lengths

<code>.</code> is the concatenation operator - it is used here after length() 
<code>$.</code> is the current line number 
<code>$_</code> is the current line

blocks|key|1203777|text|查找所有答案，不给出最长行的行号。下面的命令可以给出行号和大致长度：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1203778|$+cat+-n+test.txt+%7C+awk+'{print+"longest_line_number:+"+$1+"+length_with_line_number:+"+length}'+%7C+sort+-k4+-nr+%7C+head+-3
longest_line_number:+3+length_with_line_number:+13
longest_line_number:+4+length_with_line_number:+12
longest_line_number:+2+length_with_line_number:+11|code-block|syntax|javascript|1203779|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Looks all the answer do not give the line number of the longest line. Following command can give the line number and roughly length:

<pre><code>$ cat -n test.txt | awk '{print "longest_line_number: " $1 " length_with_line_number: " length}' | sort -k4 -nr | head -3
longest_line_number: 3 length_with_line_number: 13
longest_line_number: 4 length_with_line_number: 12
longest_line_number: 2 length_with_line_number: 11
</code></pre>

blocks|key|1418865|text|上述例子中被忽视的重要一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1418866|以下两个示例计算展开的选项卡的数量|1418867|++wc+-L++<"${SourceFile}"+
#+or
++expand+--tabs=8+"${SourceFile}"+%7C+awk+'{+if+(length($0)+>+max)+{max+=+length($0)}+}+END+{+print+max+}'|code-block|syntax|javascript|1418868|以下2个选项卡未展开。|1418869|++expand+--tabs=1+"${SourceFile}"+%7C+wc+-L+
#+or
++awk+'{+if+(length($0)+>+max)+{max+=+length($0)}+}+END+{+print+max+}'+"${SourceFile}"|1418870|所以|1418871|++++++++++++++Expanded++++nonexpanded
$'nn\tnn'+++++++10++++++++++++5|1418872|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Important overlooked point in the above examples.

The following 2 examples count expanded tabs

<pre><code> wc -L &lt;"${SourceFile}" 
# or
 expand --tabs=8 "${SourceFile}" | awk '{ if (length($0) &gt; max) {max = length($0)} } END { print max }'
</code></pre>

The following 2 count non expaned tabs.

<pre><code> expand --tabs=1 "${SourceFile}" | wc -L 
# or
 awk '{ if (length($0) &gt; max) {max = length($0)} } END { print max }' "${SourceFile}"
</code></pre>

so 

<pre><code> Expanded nonexpanded
$'nn\tnn' 10 5
</code></pre>

blocks|key|1203544|text|以下是anwser的参考资料|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1203545|cat+filename+%7C+awk+'{print+length,+$0}'%7Csort+-nr%7Chead+-1|code-block|syntax|javascript|1203546|http://wtanaka.com/node/7719|offset|length|1203547|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|S|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|T|8|@]|9|@$I|U|J|V|1|W]]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|H]]]]

Here are references of the anwser

<pre><code>cat filename | awk '{print length, $0}'|sort -nr|head -1
</code></pre>

<a href="http://wtanaka.com/node/7719" rel="nofollow noreferrer">http://wtanaka.com/node/7719</a>

blocks|key|1203581|text|在perl中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1203582|perl+-ne+'print+($l+=+$_)+if+(length+>+length($l));'+filename+%7C+tail+-1|code-block|syntax|javascript|1203583|这只打印该行，而不打印它的长度。|1203584|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In perl:

<pre><code>perl -ne 'print ($l = $_) if (length &gt; length($l));' filename | tail -1
</code></pre>

this only prints the line, not its length too.

blocks|key|1418794|text|为了好玩，这里是Powershell版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1418795|cat+filename.txt+%7C+sort+length+%7C+select+-last+1|code-block|syntax|javascript|1418796|为了得到长度：|1418797|(cat+filename.txt+%7C+sort+length+%7C+select+-last+1).Length|1418798|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Just for fun, here's the Powershell version:

<pre><code>cat filename.txt | sort length | select -last 1
</code></pre>

And to just get the length:

<pre><code>(cat filename.txt | sort length | select -last 1).Length
</code></pre>

blocks|key|1203891|text|如果你正在使用MacOS，并且得到这个错误：wc:+illegal+option+--+L，你不需要安装GNU，这样做。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1203892|如果您只想获取文件最长行中的字符数，并且您使用的是OS+X，请运行：|1203893|awk+'{print+length}'+"$file_name"+%7C+sort+-rn+%7C+head+-1|1203894|像这样的东西；|1203895|echo+"The+longest+line+in+the+file+$file_name+has+$(awk+'{print+length}'+"$file_name"+%7C+sort+-rn+%7C+head+-1)+characters"|1203896|输出：|1203897|The+longest+line+in+the+file+my_file+has+117+characters|1203898|entityMap^0|M|N|0|0|0|1I|0|0|0|3B|0|0|0|1J|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|W|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|10|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|N|3|O|5|6|7|14|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|R|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|S|$]]

If you are using MacOS and are getting this error:
<code>wc: illegal option -- L</code> you dont need to install GNU sipmly do this.

If all you want to do is just get the count of the characters in the longest line of the file and you are using OS X run:

<code>awk '{print length}' "$file_name" | sort -rn | head -1</code>

Something like this;

<code>echo "The longest line in the file $file_name has $(awk '{print length}' "$file_name" | sort -rn | head -1) characters"</code>

Outputs:

<code>The longest line in the file my_file has 117 characters</code>

I'm looking for a simple way to find the length of the longest line in a file. Ideally, it would be a simple bash shell command instead of a script.

Longest line in a file

MacOS

我正在寻找一种简单的方法来找到文件中最长行的长度。理想情况下，它应该是一个简单的bash shell命令，而不是脚本。

问文件中最长的行
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