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注释文件中的现有行并在 ksh shell 中的注释行下方添加 3 个新行

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注释文件中的现有行并在 ksh shell 中的注释行下方添加 3 个新行

配置文件有以下行：

Ciphers aes128-ctr,aes192-ctr,aes256-ctr

因此需要注释掉这一行并在注释行之后添加以下行。

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
PubkeyAcceptedKeyTypes [email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa,ssh-dss
HostKeyAlgorithms [email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ssh-ed25519,ssh-rsa,ssh-dss

输出应采用以下格式。

#Ciphers aes128-ctr,aes192-ctr,aes256-ctr
Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
PubkeyAcceptedKeyTypes [email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa,ssh-dss
HostKeyAlgorithms [email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ssh-ed25519,ssh-rsa,ssh-dss

答案1

尝试

sed '/Ciphers aes128-ctr,aes192-ctr,aes256-ctr/ {s/^/#/; a\
Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128cbc,3des-cbc,blowfish-cbc,cast128- . . . 
}' file

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