下载源码包：http://netcat.sourceforge.net/download.php
# tar -xzvf netcat-0.7.1.tar.gz [root@znode02 netcat-0.7.1]# ls ABOUT-NLS config.guess configure INSTALL Makefile.am NEWS TODO aclocal.m4 config.h.in configure.ac install-sh Makefile.in po AUTHORS config.rpath COPYING lib missing README ChangeLog config.sub doc m4 mkinstalldirs src # mkdir /apps # ./configure --prefix=/apps/nc [root@znode02 netcat-0.7.1]# ls ABOUT-NLS config.h config.sub INSTALL Makefile.am po aclocal.m4 config.h.in configure install-sh Makefile.in README AUTHORS config.log configure.ac lib missing src ChangeLog config.rpath COPYING m4 mkinstalldirs stamp-h1 config.guess config.status doc Makefile NEWS TODO ]# make && make install # tree /apps/nc /apps/nc ├── bin │ ├── nc -> netcat │ └── netcat ├── info │ ├── dir │ └── netcat.info ├── man │ └── man1 │ └── netcat.1 └── share └── locale ├── it │ └── LC_MESSAGES │ └── netcat.mo └── sk └── LC_MESSAGES └── netcat.mo 10 directories, 7 files
增加环境变量：
# cat /root/.bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin NC=/apps/nc PATH=$PATH:$NC/bin export PATH
# source ~/.bash_profile
验证：
# nc -h GNU netcat 0.7.1, a rewrite of the famous networking tool. Basic usages: connect to somewhere: nc [options] hostname port [port] ... listen for inbound: nc -l -p port [options] [hostname] [port] ... tunnel to somewhere: nc -L hostname:port -p port [options] Mandatory arguments to long options are mandatory for short options too. Options: -c, --close close connection on EOF from stdin -e, --exec=PROGRAM program to exec after connect -g, --gateway=LIST source-routing hop point[s], up to 8 -G, --pointer=NUM source-routing pointer: 4, 8, 12, ... -h, --help display this help and exit -i, --interval=SECS delay interval for lines sent, ports scanned -l, --listen listen mode, for inbound connects -L, --tunnel=ADDRESS:PORT forward local port to remote address -n, --dont-resolve numeric-only IP addresses, no DNS -o, --output=FILE output hexdump traffic to FILE (implies -x) -p, --local-port=NUM local port number -r, --randomize randomize local and remote ports -s, --source=ADDRESS local source address (ip or hostname) -t, --tcp TCP mode (default) -T, --telnet answer using TELNET negotiation -u, --udp UDP mode -v, --verbose verbose (use twice to be more verbose) -V, --version output version information and exit -x, --hexdump hexdump incoming and outgoing traffic -w, --wait=SECS timeout for connects and final net reads -z, --zero zero-I/O mode (used for scanning) Remote port number can also be specified as range. Example: '1-1024'