how to install nc with yum
rpm -q nc
you can
try nc -l
9999 then nc -l -p
9999
then before you downgrade the package you should check your system's kernel you can
type :
1、uname -a
2、file /bin/ls
for 64
sudo yum downgrade http:
for 32
sudo yum downgrade http:
then it's ok
nc -lk
9999
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