Replace string in a file.

Shell Programming and Scripting
1

Hopefully my request is a simple one. I need to replace, rather remove the string </IfModule> from a file, tls.conf. As I have a script that adds a bunch of other lines including that one to the end of the file.

2

Use awk with an interim temp file.

3

Can you post what you've tried to solve this...

4

I'm quite new to all this so some of my syntax is probably incorrect.

sudo awk '{sub("</IfModule>", "TLSRequired off", $0); print}' /etc/proftpd/tlsBAK.conf

sed -i 's/</IfModule>/TLSRequired off/g' /etc/proftpd/tlsBAK.conf

sudo sed -i -e 's/\<\//IfModule/>/test/g' /etc/proftpd/tlsBAK.conf

sudo sed -i -e 's/^\/\/\"</IfModule>";/\"TLSRequired off";/' /etc/proftpd/tlsBAK.conf


sudo bash -c 'echo -e "\nTLSRequired off" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSProtocol TLSv1" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSRSACertificateFile /etc/webmin/miniserv.pem" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSRSACertificateKeyFile /etc/webmin/miniserv.pem" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSCipherSuite HIGH:!ADH:!AES256-SHA:!ECDHE-RSA-AES256-SHA384:!AES128-SHA:!DES-CBC3-SHA:!DES-CBC3-MD5:!IDEA-CBC-SHA:!RC4-MD5:!IDEA-CBC-MD5:!RC2-CBC-MD5:!MD5:!aNULL:!EDH:!AESGCM" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSVerifyClient off" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSRenegotiate ctrl 3600 data 512000 required off timeout 300" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSLog /var/log/proftpd/tls.log" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo "TLSOptions NoSessionReuseRequired" >> /etc/proftpd/tls.conf'
sudo bash -c 'echo -e "\n</IfModule>" >> /etc/proftpd/tls.conf'

</IfModule> is added at the end. Needs to delete the first instance as it is replaced.

# What file currently looks like

</IfModule>

# Added by script
TLSRequired off
TLSProtocol TLSv1
TLSRSACertificateFile /etc/webmin/miniserv.pem
TLSRSACertificateKeyFile /etc/webmin/miniserv.pem
TLSCipherSuite HIGH:!ADH:!AES256-SHA:!ECDHE-RSA-AES256-SHA384:!AES128-SHA:!DES-CBC3-SHA:!DES-CBC3-MD5:!IDEA-CBC-SHA:!RC4-MD5:!IDEA-CBC-MD5:!RC2-CBC-MD5:!MD5:!aNULL:!EDH:!AESGCM
TLSVerifyClient off
TLSRenegotiate ctrl 3600 data 512000 required off timeout 300
TLSLog /var/log/proftpd/tls.log
TLSOptions NoSessionReuseRequired

</IfModule>