CentoOS6.6安装netcat

CentOS下安装netcat

使用zookeeper过程中，需要监控集群状态。在使用四字命令时（echo conf | nc localhost 2181），报出如下错误：-bash: netcat: command not found。

我的系统是CentOS 6.6, 64位系统，默认没有安装netcat，下面时安装过程中遇到的一些问题。(下面都是使用root用户)

下载netcat安装包

wget http://sourceforge.net/projects/netcat/files/netcat/0.7.1/netcat-0.7.1-1.i386.rpm
执行安装rpm -ihv netcat-0.7.1-1.i386.rpm

rpm -ihv netcat-0.7.1-1.i386.rpm
warning: netcat-0.7.1-1.i386.rpm: Header V3 DSA/SHA1 Signature, key ID b2d79fc1: NOKEY
error: Failed dependencies:
libc.so.6 is needed by netcat-0.7.1-1.i386
libc.so.6(GLIBC_2.0) is needed by netcat-0.7.1-1.i386
libc.so.6(GLIBC_2.1) is needed by netcat-0.7.1-1.i386
libc.so.6(GLIBC_2.3) is needed by netcat-0.7.1-1.i386

解决依赖包问题

yum list glibc*

Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Installed Packages
glibc.x86_64           2.12-1.149.el6        @anaconda-CentOS-201410241409.x86_64/6.6
glibc-common.x86_64    2.12-1.149.el6        @anaconda-CentOS-201410241409.x86_64/6.6
glibc-devel.x86_64     2.12-1.149.el6        @anaconda-CentOS-201410241409.x86_64/6.6
glibc-headers.x86_64   2.12-1.149.el6        @anaconda-CentOS-201410241409.x86_64/6.6
Available Packages
glibc.i686             2.12-1.149.el6_6.9    updates
glibc.x86_64           2.12-1.149.el6_6.9    updates
glibc-common.x86_64    2.12-1.149.el6_6.9    updates
glibc-devel.i686       2.12-1.149.el6_6.9    updates
glibc-devel.x86_64     2.12-1.149.el6_6.9    updates
glibc-headers.x86_64   2.12-1.149.el6_6.9    updates
glibc-static.i686      2.12-1.149.el6_6.9    updates
glibc-static.x86_64    2.12-1.149.el6_6.9    updates
glibc-utils.x86_64     2.12-1.149.el6_6.9    updates

安装命令：

yum install glibc.i686

rpm -ihv netcat-0.7.1-1.i386.rpm
warning: netcat-0.7.1-1.i386.rpm: Header V3 DSA/SHA1 Signature, key ID b2d79fc1: NOKEY
Preparing...                ########################################### [100%]
1:netcat                 ########################################### [100%]

安装netcat包

rpm -ihv netcat-0.7.1-1.i386.rpm

rpm -ihv netcat-0.7.1-1.i386.rpm
warning: netcat-0.7.1-1.i386.rpm: Header V3 DSA/SHA1 Signature, key ID b2d79fc1: NOKEY
Preparing...                ########################################### [100%]
1:netcat                 ########################################### [100%]

再次测试zookeeper的四字命令，终于成功啦。

echo conf | nc localhost 2181
clientPort=2181
dataDir=/data/zk/data1/version-2
dataLogDir=/data/zk/log1/version-2
tickTime=2000
maxClientCnxns=500
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=1
initLimit=10
syncLimit=5
electionAlg=3
electionPort=3891
quorumPort=2891
peerType=0