Sed delete and add data uplink and downlink of the specified line

Topic 1: delete matching rows of data on one line and the next line

1. Remove the upper and lower lines of matching lines:

sed -i -e '/string/{n;d}' -e '$!N;/\n.*string/!P;D' filename 

2. Delete matched to the specific character of the row row

sed -i -e '$!N;/\n.*string/!P;D' filename

3. Delete the next line matching to a specific row containing the character

sed -i -e '/string/{n;d}' filename

4.sed use variables, delete the matching rows on one line and the next line:

AA=string     #变量指定匹配字符串
sed -i -e '/'"$AA"'$/{n;d}' -e '$!N;/\n.*'"$AA"'$/!P;D' file

Problem two: the rows to match the character string of the next line or to insert a data

a additional contents sed '/ matching word / a \ was added to the contents of the' example.file (the additional content to match the position of the next target row)
I Inserts sed '/ matching word / i \ content to be added' example .file the content into the target matching row on row position)
example:
# I want the file contains "chengyongxu.com" the keyword is added before the line or row after row, says "allow chengyongxu.cn"

1   #行前加
2   sed -i '/allow chengyongxu.com/i\allow chengyongxu.cn' the.conf.file
3   #行前后
4   sed -i '/allow chengyongxu.com/a\allow chengyongxu.cn' the.conf.file

Matched to the specific file to the next line of the character string to insert a row:

sed -i '/listen/a\   listen 80\;'   filename

Bulk insert multiple rows of data in a row after matched to specific character string:

sed -i '/syncsendmsg.php/a\#013.平台广告小时计划每5分钟写入主平台 xxx 2019-07-04\n*/5 * * * * /usr/bin/php /data/cron/ptask/countjs_syc_plan_main.php\n*/5 * * * * /usr/bin/php /data/cron/ptask/countjs_syc_plan_h_main.php'  filename

In particular to the matching character string to a file on line insert a row:

sed -i '/listen/i\   listen 80\;' filename

Issue three: to delete the rows matching the specified string located either next row

1, delete the specified line on the line

sed -i -e :a -e '$!N;s/.*\n\(.*ServerName abc.com\)/\1/;ta' -e 'P;D' file
例如：
[root@VM_82_178_centos vhost]# grep listen m.afpfpm.cn443.conf 
   listen 80;
   listen       443;

删除   listen       443；这一行的上行内容：    listen 80;
sed -i -e :a -e '$!N;s/.*\n\(.*listen       443\)/\1/;ta' -e 'P;D' m.afpfpm.cn443.conf

2, delete the contents between the specified string

sed -i '/ServerName abc.com/,/\/VirtualHost/d' $file

http://www.linuxso.com/shell/17542.html

Replace the characters in the production of nginx configuration file

sed -i 's/#fastcgi_pass/fastcgi_pass/g;s/fastcgi_pass  unix:\/dev\/shm\/php-cgi.sock/#fastcgi_pass  unix:\/dev\/shm\/php-cgi.sock/g'  m.6saeq.cn443.conf

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