我怎么能够用 has(如MD5)的厚度取代一栏?
原始档案是多余的,因此我需要真正高效。
我怎么能够用 has(如MD5)的厚度取代一栏?
原始档案是多余的,因此我需要真正高效。
我复制了过去对冲绳的反应,但我添加了近线,以避免出现这一职位上提出的问题:gawk / awk: pipingday to culine *sometimes*nk t work
awk {
tmp="echo " $2 " | openssl md5 | cut -f2 -d" ""
tmp | getline cksum
close(tmp)
$2=cksum
print
} < sample
因此,你并不真的希望用<代码>wk来做到这一点。 公开的高档语言——Perl语、Alfredo语、Ruby语等——将以更简单、更强的方式这样做。 说了这番话后,这样做将奏效。
考虑到这方面的投入:
this is a test
(例如,用四列一行,我们可以将一栏替换成五栏,如:
awk {
tmp="echo " $2 " | openssl md5 | cut -f2 -d" ""
tmp | getline cksum
$2=cksum
print
} < sample
This relies on GNU awk (you ll probably have this by default on a Linux system), and it uses openssl
to generate the md5 checksum. We first build a shell command line in tmp
to pass the selected column to the md5
command. Then we pipe the output into the cksum
variable, and replace column 2 with the checksum. Given the sample input above, the output of this awk script would be:
this 7e1b6dbfa824d5d114e96981cededd00 a test
This might work using Bash/GNU sed:
<<<"this is a test" sed -r s/(S+s)(S+)(.*)/echo "1 $(md5sum <<<"2") 3"/e;s/ - //
this 7e1b6dbfa824d5d114e96981cededd00 a test
或主要的解决办法:
<<<"this is a test" sed -r h;s/^S+s(S+).*/md5sum <<<"1"/e;G;s/^(S+).*
(S+)sS+s(.*)/2 1 3/
this 7e1b6dbfa824d5d114e96981cededd00 a test
替换<代码>is,从上删除。
解释:
首先:确定栏目,将背参考资料作为Bash指挥中的参数使用,然后加以替代和评价,从而进行宇宙变换,以丢失由md5sum指挥部生成的档案说明(在这种情况下,标准投入)。
在第二种情况下:即,类似于先向封闭空间提供方言,然后在评价五舍五入的指挥、将舱载
你们也可以这样做:
echo "aze qsd wxc" | perl -MDigest::MD5 -ne print "$1 ".Digest::MD5::md5_hex($2)." $3" if /([^ ]+) ([^ ]+) ([^ ]+)/
aze 511e33b4b0fe4bf75aa3bbac63311e5a wxc
如果你想要混淆大量数据,则可能比每条线需要立下5立方米的 s子更快。
虽然我没有做任何基准工作,但你在<条码>上<>read>/code>上可能有更多的时间。
投入(cratch001.txt):
foo|bar|foobar|baz|bang|bazbang
baz|bang|bazbang|foo|bar|foobar
改为read
:
while IFS="|" read -r one fish twofish red fishy bluefishy; do
twofish=`echo -n $twofish | md5sum | tr -d " -"`
echo "$one|$fish|$twofish|$red|$fishy|$bluefishy"
done < scratch001.txt
产出:
foo|bar|3858f62230ac3c915f300c664312c63f|baz|bang|bazbang
baz|bang|19e737ea1f14d36fc0a85fbe0c3e76f9|foo|bar|foobar
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