Html t#1是指：在模块中：concat#2-65535@smihael：你说得对，这是多余的。移除它。谢谢你的关注！ awk 'BEGIN{ RS="</a>" IGNORECASE=1 } { for(o=1;o<=NF;o++){

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t#1是指：在模块中：concat#2-65535@smihael：你说得对，这是多余的。移除它。谢谢你的关注！

awk 'BEGIN{
RS="</a>"
IGNORECASE=1
}
{
  for(o=1;o<=NF;o++){
    if ( $o ~ /href/){
      gsub(/.*href=\042/,"",$o)
      gsub(/\042.*/,"",$o)
      print $(o)
    }
  }
}' index.html

\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))

cat f.html | grep -o \
    -E '\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))'

$ wget -O - http://stackoverflow.com | \
  grep -io '<a href=['"'"'"][^"'"'"']*['"'"'"]' | \
  sed -e 's/^<a href=["'"'"']//i' -e 's/["'"'"']$//i'

lynx -dump -listonly my.html

lynx -dump -hiddenlinks=listonly my.html

cat index.html | grep -o '<a .*href=.*>' | sed -e 's/<a /\n<a /g' | sed -e 's/<a .*href=['"'"'"]//' -e 's/["'"'"'].*$//' -e '/^$/ d'

grep "<a href=" sourcepage.html
  |sed "s/<a href/\\n<a href/g" 
  |sed 's/\"/\"><\/a>\n/2'
  |grep href
  |sort |uniq

curl --silent -u "<username>:<password>" http://<NAGIOS_HOST/nagios/cgi-bin/status.cgi|grep 'extinfo.cgi?type=1&host='|grep "status"|awk -F'</A>' '{print $1}'|awk -F"'>" '{print $3"\t"$1}'|sed 's/<\/a>&nbsp;<\/td>//g'| column -c2 -t|awk '{print $1}'

$ xidel --extract "//a/@href" http://example.com/

$ xidel --extract "//a/resolve-uri(@href, base-uri())" http://example.com/

grep "<a href=" sourcepage.html
  |sed "s/<a href/\\n<a href/g" 
  |sed 's/\"/\"><\/a>\n/2'
  |grep href
  |sort |uniq
# now adding some more
  |grep -v "<a href=\"#"
  |grep -v "<a href=\"../"
  |grep -v "<a href=\"http"

a=$1

lynx -listonly -dump "$a" > temp

awk 'FNR > 2 {print$2}' temp > temp2.txt

rm temp

>sh test.sh http://link.com

grep -Po 'href="\K.*?(?=")'

$ cat source_file.html | tr '"' '\n' | tr "'" '\n' | grep -e '^https://' -e '^http://' -e'^//' | sort | uniq

$ curl "https://www.cnn.com" | tr '"' '\n' | tr "'" '\n' | grep -e '^https://' -e '^http://' -e'^//' | sort | uniq

//s3.amazonaws.com/cnn-sponsored-content
//twitter.com/cnn
https://us.cnn.com
https://www.cnn.com
https://www.cnn.com/2018/10/27/us/new-york-hudson-river-bodies-identified/index.html\
https://www.cnn.com/2018/11/01/tech/google-employee-walkout-andy-rubin/index.html\
https://www.cnn.com/election/2016/results/exit-polls\
https://www.cnn.com/profiles/frederik-pleitgen\
https://www.facebook.com/cnn
etc...