Remove line with the pattern match and the next line

You can use sed with the N and d commands and a {} block:

sed -e '/pattern here/ { N; d; }'

For every line that matches pattern here, the code in the {} gets executed. N takes the next line into the pattern space as well, and then d deletes the whole thing before moving on to the next line. This works in any POSIX-compatible sed.

Most seds do not print the last line if you N on $. But GNU sed will. So if the pattern you want deleted is on the last line and you N it will print. It is sometimes better to keep the buffer full - as in, always holding 2 lines except on the lines you do not want to print. You might do so like:

seq 10 | sed -n 'x;/7/!g;//!p'

That's an example with seq as input. On every line it swaps hold space and pattern space. If the last held line does not match a 7 (in this case) it will overwrite the hold space with the current line. It then checks again that the line it just pulled in - the current line - also does not match the 7, otherwise it will not print it. So on every line it checks the previous and the current line.

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And if your pattern does fall on the last line:

seq 10 | sed -n 'x;/10/!g;//!p' 

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Another example, to hopefully demonstrate more clearly what it will and will not print:

sed -n 'x;/match/!g;//!p
' <<\DATA
    match 
    match 
    1not 
    2not 
    3not 
    4not 
    5not 
    match 
    6not 
    match                                                              
DATA

OUTPUT

2not
3not
4not
5not

An awk solution:

awk '/pattern/    { matched=1; next }
     1 == matched { matched = 0; next }
                  { print }' input-file

Line 1 looks for lines matching the pattern, sets a flag, and skips the line. Line 2 skips a line when the flag is set, but resets the flag. Line 3 prints lines that weren't skipped by one of the other two lines.

You can type this on one line if you like:

awk '/pattern/{matched=1;next} 1==matched{matched=0;next} {print}' input-file

Here's a variation that lets you control how many lines to skip:

awk '/pattern/{skip=3;next} skip>0{--skip;next} {print}' input-file

Set skip to the number of lines that should be skipped (in addition to the matched line).