wc

Why echo splits long lines in 80 chars when printing within quotes? (And how to fix it?)

由 梦想与她 提交于 2019-12-11 20:25:47
问题 Echoing without quotes... 1 line. Fine. $ echo $(ls -1dmb /bin/*) > test $ wc -l test 1 test Echoing with quotes... 396 lines. Bad. $ echo "$(ls -1dmb /bin/*)" > test $ wc -l test 396 test The problem comes when using echo for writing a file and expanding a long variable. Why does this happen? How to fix it? 回答1: ls is detecting that your stdout is not a terminal. check the output of ls -1dmb /bin/* | cat vs ls -1dmb /bin/* . It's ls , who is splitting the output. Similarly, for ls --color

new svn server, same ip

由 送分小仙女□ 提交于 2019-12-11 16:51:41
问题 Here is my problem: My server crashed last night! So i had to go out and buy some new stuff and i now have a new server. I have everything set back up and i am trying to set my svn server back up. I have it set back up. I have my files on another pc that i want to commit to the svn server to start my repository back up. How do i get those files into the repository again? The server has the same ip as it was before. I have tried a relocate and a switch, but i keep getting this error: The

Regarding the Unix command “wc” what is considered as a word?

由 拟墨画扇 提交于 2019-12-10 23:08:27
问题 The command wc provides lineCount , wordCount , and charCount . I am writing a program that simulates the wc command as it takes a file and spits out the 3 properties. Line count is easy because if it sees \n it will ++lineCount and if a char exists and it's not EOF, it will ++charCount . But what does word mean? What separates words, whitespace? 回答1: This is specified by POSIX: The wc utility shall consider a word to be a non-zero-length string of characters delimited by white space. The man

Append wc lines to filename

由 一世执手 提交于 2019-12-10 16:16:00
问题 Title says it all. I've managed to get just the lines with this: lines=$(wc file.txt | awk {'print $1'}); But I could use an assist appending this to the filename. Bonus points for showing me how to loop this over all the .txt files in the current directory. 回答1: find -name '*.txt' -execdir bash -c \ 'mv -v "$0" "${0%.txt}_$(wc -l < "$0").txt"' {} \; where the bash command is executed for each ( \; ) matched file; {} is replaced by the currently processed filename and passed as the first

mark_Linux_wc

由 蹲街弑〆低调 提交于 2019-12-09 13:18:59
Linux wc命令 Linux wc命令用于计算字数。 利用wc指令我们可以计算文件的Byte数、字数、或是列数，若不指定文件名称、或是所给予的文件名为"-"，则wc指令会从标准输入设备读取数据。 语法 wc [-clw][--help][--version][文件...] 参数 ： -c或--bytes或--chars 只显示Bytes数。 -l或--lines 只显示行数。 -w或--words 只显示字数。 --help 在线帮助。 --version 显示版本信息。 实例 在默认的情况下，wc将计算指定文件的行数、字数，以及字节数。使用的命令为： wc testfile 先查看testfile文件的内容，可以看到： $ cat testfile Linux networks are becoming more and more common, but scurity is often an overlooked issue. Unfortunately, in today’s environment all networks are potential hacker targets, fro0m tp-secret military research networks to small home LANs. Linux Network Securty focuses on

WC on OSX - Return includes spaces

由 倾然丶 夕夏残阳落幕 提交于 2019-12-08 07:43:34
When I run the word count command in OSX terminal like wc -c file.txt I get the below answer that includes spaces padded before the answer. Does anyone know why this happens, or how I can prevent it? 18000 file.txt I would expect to get: 18000 file.txt This occurs using bash or bourne shell. I suppose it is a way of getting outputs to line up nicely, and as far as I know there is no option to wc which fine tunes the output format. You could get rid of them pretty easily by piping through sed 's/^ *//' , for example. There may be an even simpler solution, depending on why you want to get rid of

WC on OSX - Return includes spaces

由 …衆ロ難τιáo~ 提交于 2019-12-08 04:26:23
问题 When I run the word count command in OSX terminal like wc -c file.txt I get the below answer that includes spaces padded before the answer. Does anyone know why this happens, or how I can prevent it? 18000 file.txt I would expect to get: 18000 file.txt This occurs using bash or bourne shell. 回答1: I suppose it is a way of getting outputs to line up nicely, and as far as I know there is no option to wc which fine tunes the output format. You could get rid of them pretty easily by piping through

How can I compare 3 files together (to see what is in common between them)?

由 瘦欲@ 提交于 2019-12-06 09:08:18
I want to compare 3 files together to see how much of the information in the files are the same. The file format is something like this: Chr11 447 . A C 74 . DP=22;AF1=1;CI95=1,1;DP4=0,0,9,8;MQ=15;FQ=-78 GT:PL:GQ 1/1:107,51,0:99 Chr10 449 . G C 35 . DP=26;AF1=0.5;CI95=0.5,0.5;DP4=5,0,7,8;MQ=20;FQ=11.3;PV4=0.055,0.0083,0.028,1 GT:PL:GQ 0/1:65,0,38:41 Chr12 517 . G A 222 . DP=122;AF1=1;CI95=1,1;DP4=0,0,77,40;MQ=23;FQ=-282 GT:PL:GQ 1/1:255,255,0:99 Chr10 761 . G A 41 . DP=93;AF1=0.5;CI95=0.5,0.5;DP4=11,34,6,35;MQ=19;FQ=44;PV4=0.29,1.8e-35,1,1 GT:PL:GQ 0/1:71,0,116:74 I'm only interested in the

Linux命令-查看目录下文件个数

由 半城伤御伤魂 提交于 2019-12-06 08:39:09
1、查看当前目录下文件个数 ls -l |grep "^-" | wc -l 2、查看当前目录下包含子目录的文件个数 ls -lR |grep "^-" | wc -l 3、查看当前目录下目录个数 ls -l |grep "^d" | wc -l 4、查看当前目录下包含子目录的目录个数 ls -lR |grep "^d" | wc -l 来源： https://www.cnblogs.com/cailingsunny/p/11972883.html

Insecure $ENV{ENV} while running with -T switch

由 青春壹個敷衍的年華 提交于 2019-12-05 19:51:28
When I try the last example from perlfaq5: How-do-I-count-the-number-of-lines-in-a-file? I get an error-message. What should I do to get the script working? #!/usr/local/bin/perl -T use warnings; use 5.012; $ENV{PATH} = undef; my $filename = 'perl2.pl'; if( $filename =~ /^([0-9a-z_.]+)\z/ ) { my $lines = `/usr/bin/wc -l $1`; print $lines; } Output: Insecure $ENV{ENV} while running with -T switch at ./perl1.pl line 10. 2nd Edition of Answer The perldoc perlsec manual describes taint mode (there is also perldoc Taint for a module related to Taint mode). In part, it illustrates: $path = $ENV{
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