sed博大精深，本人除了简单的用法，其他的在工作中尚未深入研究。
另，附上几个blog的文章，后续可能会更新这个列表：
- sed命令详解：http://www.cnblogs.com/edwardlost/archive/2010/09/17/1829145.html
- sed单行脚本快速参考 ：http://blog.csdn.net/showman/article/details/4408937
【SED】
删除注释#和空行：
sed ‘/ *#/d; /^ *$/d‘
统计行数：
sed -n ‘$=‘ log/query.log
2546
删掉空格：
sed ‘s/\ //g‘
删掉]：
sed ‘s/]//g‘
匹配行前（i，后a）增加一行：
sed -i ‘/-A INPUT -j REJECT --reject-with icmp-host-prohibited/i\-A INPUT -p tcp -m state --state NEW -m tcp --dport 10050 -j ACCEPT‘ rc.firewall.txt
sed -i ‘/-A INPUT -p icmp -j ACCEPT /a\-A INPUT -p vrrp -j ACCEPT‘ rc.firewall.txt
删掉指定字符
sed ‘s/insert ignore//g‘ 1.txt |sed ‘s/insert//g‘ |sed ‘s/\ //g‘ |sort |uniq -c |sort -nr |more
截取内容，根据时间段：
sed -n ‘/2013:14:00:00/,/2013:14:40:00/p‘ 0305.log > 1400.1440.log
zcat 2014-06-17-0000-2330_msg.ecqun.com.cn.log.gz |sed -n ‘/2014:08:00:00/,/2014:10:00:00/p‘ |more
替换：
echo "http://192.168.0.154:10010/?from=PEK&to=SHA&date=2013-12-02&enddate=2013-12-02&type=text" | sed -r "s/([0-9]{4}-[0-9]{2}-[0-9]{2})/$(date +%F)/g"
echo "20140625232336" |sed -r ‘s/([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})/\1-\2-\3 \4:\5:\6/‘
2014-06-25 23:23:36
打印指定行：
sed -n ‘2p‘ 1630.1650.log_7_1
删掉指定行：
sed 1,8d WAN.IP
两行并一行：
sed ‘N;s/\n//‘
注意，下列用法和上面的区别：
sed ‘:a;N;s/\n//;ta‘
sed ‘:a;...;ta‘的作用：
:a表示：建立一个标签a；ta表示：如果执行成功，则跳转到标签a处继续执行
t label
If a s/// has done a successful substitution since the last input line was read and since the last t or T command, then branch to label; if label is omitted, branch to end of script.
补充一下，得是前面的s///替换语句执行成功了，才跳转到标签
-------------------
“p” command prints the buffer (remember to use -n option with “p”)
“d” command is just opposite, its for deletion. ‘d’ will delete the pattern space buffer and immediately starts the next cycle.
P：Print up to the first embedded newline of the current pattern space.
D：If pattern space contains no newline, start a normal new cycle as if the d command was issued. Otherwise, delete text in the pattern space up to the first newline, and restart cycle with the resultant pattern space, without reading a new line of input.
N：Add a newline to the pattern space, then append the next line of input to the pattern space. If there is no more input then sed exits without processing any more commands.
时间： 2024-08-10 21:29:24