Question

我正在尝试安装Nagios插件，该文件名为nagios，并且是用PERL编写的 - 这个文件将帮助我们将Nagios docker警报系统与slack集成。

我需要做的是使用sed打开文件，在第120行和第304行找到特定的模式，并在每行的末尾添加变量内容。

#!/usr/bin/env bash

# go into temp dir and do the following
cd /tmp/ && wget https://raw.github.com/tinyspeck/services-examples/master/nagios.pl
mv /tmp/nagios.pl /tmp/slack_nagios.pl && chmod +x /tmp/slack_nagios.pl

# define two variables adding1 and adding2, then add value to each one 
read -d '' adding1 <<"BLOCK"
-field HOSTALIAS="$HOSTNAME$"
-field SERVICEDESC="$SERVICEDESC$"
-field SERVICESTATE="$SERVICESTATE$"
-field SERVICEOUTPUT="$SERVICEOUTPUT$"
-field NOTIFICATIONTYPE="$NOTIFICATIONTYPE$"
BLOCK

read -d '' adding2 <<"BLOCK"
-field HOSTALIAS="$HOSTNAME$"
-field HOSTSTATE="$HOSTSTATE$"
-field HOSTOUTPUT="$HOSTOUTPUT$"
-field NOTIFICATIONTYPE="$NOTIFICATIONTYPE$"
BLOCK

## Print the two new variables
echo $adding1

echo $adding2

#### Now use seed to change the content of slack_nagios.pl file and save it as new file
echo "Execute sed"

# On file lines 31 to 50 uncomment it 
sed -e '31,50 s/#//' \
    -e 's/my $opt_token = ""/my $opt_token = "someTokenHere"/' \
    -e 's/foo.slack.com/somedomainName.slack.com/' \
    # Add toke info and replace slack domain name
    -e 's/#alerts/#nagios_alerts/' \
    -e 's/#ops/#nagios_alerts/' \
    # Find two patterns in the file and replace with nagios_alerts
    -e 's|/usr/local/bin|/usrPATH/local/nagiosPATH/etc/dirPATH|g' \
    # Replace the deafult path by the new path
    ###HERE IS WHERE I HAVIN PROBLEMS##
    -e '44 s/^nagios_alerts\|\'$'\|${adding1}|g' \
    -e '49 s/^nagios_alerts\|\'$'\|${adding2}|g' \
    # What I want to do is, on lines 44 and line 49 find the pattern nagios_alert
    # And append the value of $adding1 at end of line 44 and append the value of $adding2 on line 49
    # But I am getting the following error [ sed: 1: "44 s/^nagios_alerts///| ...": bad flag in substitute command: '/' ]
    <slack_nagios.pl >slack_new_nagios.pl



# Count the number of line on the file to confirm that is correct
nbLines=$(cat -n slack_new_nagios.pl | tail -n 1 | cut -f1 | xargs)
echo $nbLines

#echo $file 
echo "All Done"

Answer 1

我没有花足够的时间来理解您的具体示例，但您要解决的一般问题是

sed '120,304{/pattern/s/$/add_this_to_end_of_line/}' file

请注意，这可以转换为awk，如果您需要进行更复杂的更改，这将为您提供更多功能

awk 'NR>=120 && NR<=304 && /pattern/{$0=$0 "add this"}1' file

如何使用Sed查找文件模式并在行尾附加变量值

1 个答案: