shell脚本实现将文件中的几行输出合并成一行显示现在有一个文件aa.txt ,其实现格式如下，而我想实现的结果是192.168.1.17 down[root@localhost shell]# cat aa.txt 192.168.1.17 down 192.168.1.103 open 192.168.1.221 open 192.168.1.104 down 192.168.1.175 down 192.168.1.112 open 192.168.1.11 down [root@localhost shell]# awk "{if （NR%2==0）{print $0} else {printf"%s ",$0}}" aa.txt 192.168.1.17 down 192.168.1.103 open 192.168.1.221 open 192.168.1.104 down 192.168.1.175 down 192.168.1.112 open 192.168.1.11 down 或者[root@localhost shell]# cat aa.txt | awk "{if（NR%2！=0）ORS=" ";else ORS="
";print}" 192.168.1.17 down 192.168.1.103 open 192.168.1.221 open 192.168.1.104 down 192.168.1.175 down 192.168.1.112 open 192.168.1.11 down但是如果aa.txt 的内容如果换种形式################################################# 搞开发的同事让我把他写个脚本可以实现ipset.sh eth0 192.168.1.1 255.255.255.0 192.168.254.254来配置某个网卡的信息#！/bin/bash hwaddr=`ifconfig |grep HWaddr |awk "{print $5}"` echo "DEVICE=$1 HWADDR=$hwaddr TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=static IPADDR=$2 NETMASK=$3 GATEWAY=$4" > /etc/sysconfig/network-scripts/ifcfg-$1 service network restart推荐阅读：Linux Shell脚本语言与数学表达式 http://www.linuxidc.com/Linux/2013-09/90632.htmShell 循环语句用法小结 http://www.linuxidc.com/Linux/2012-02/54474.htmLinux下Shell编程——awk编程 http://www.linuxidc.com/Linux/2013-06/85527.htmLinux下Shell编程——sed命令基本用法 http://www.linuxidc.com/Linux/2013-06/85526.htmLinux下Shell编程——grep命令的基本运用 http://www.linuxidc.com/Linux/2013-06/85525.htmLinux下Shell编程——正则表达式基础与扩展 http://www.linuxidc.com/Linux/2013-06/85523.htm
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