怎么实现替换

feigepp

有个file：
master:0:1005::/home/clish:/opt/VRTSnasgw/scripts/mick.sh
support:0:0::/home/support:/bin/bash
sfs-replication:0:0::/home/sfs-replication:/bin/bash
admin:0:100::/home/admin:/bin/bash

怎么把master和support这俩用户最后那个“：”之后的内容换成1234

where27

awk -F: -v OFS=":" '/^master/||/^support/{$NF=1234}1' file

feigepp

回复 2# where27


    谢谢，如果我不是替换成1234，而是替换成1/2.34，且把修改的内容直接写回原文件，这个怎么弄？

where27

awk -F: -v OFS=":" '/^master/||/^support/{$NF="1/2.34"}1' file >file.bak
mv file.bak file

Shell_HAT

1. 
   
2. sed -i 's#:[^:]\+$#:1/2.34#' urfile
   

复制代码

todayhero

1. awk -F: -v OFS=":" '$1 ~ /master/ || $1 ~ /support/ {$NF=1234}1' yrfile  

复制代码

feigepp

回复 4# where27


    多谢

aluoyeshi

awk -F: '/master|support/{gsub($7,"1234")}1' file

whoiswhoz

sed  -e '/master/ s/\/bin\/bash/1234/g' -e '/support/ s/\/bin\/bash/1\/2\.34/g' sedtest

hanner_cheung

awk -F: '/master|support/{gsub($7,"1234")}1' file
aluoyeshi 发表于 2010-06-01 22:11

    弱弱的問一句：awk -F: '/master/support/{gsub($7,"1234")}1' 中最後單獨的1該怎么理解？