SED add delete replace

                                  

SED add/ delete/ replace
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sed -f <scriptname> <filename>  # runs the scripted commands against the <filename>

example:

sed -f deletescript myfile.ldif 
sed -f addscript newfile.ldif 

or from command line:

sed '/<searchstring>/d' filename

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deletescript:

# deletes any line containing <searchstring>

/<searchstring>/d

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addscript:

# adds the <newline entry> above any line containing <searchstring>

/<searchstring>/i\
<newline entry>

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addscript:

# adds the <newline entry> beneath any line containing <searchstring>

/<searchstring>/a\
<newline entry>

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replacescript:

# replaces the <searchstring> with the <newline entry>

/<searchstring>/c\
<newline entry>

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change every lowercase a, b and c to uppercase

sed 'y/abc/ABC/' filename

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Change every instance of <string> with <newstring>

sed 's/string/newstring/g' filename

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