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sed variables

Niransha answered on April 10, 2023 Popularity 5/10 Helpfulness 1/10

answer sed variables

related sed with variable

sed variables

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with variables .. use " " 
# replace in line 80 to 83 -> AC(dimer) with CT 
start_line=80
end_line=83
replacement="CT"
sed -i -e  "${start_line},${end_line} s/${dimer[j]}/${replacement}/g" frcmod.beta.${dimer[j]}  # if you remove /g replace only first instant of the line
										^another var 	              ^file

Popularity 5/10 Helpfulness 1/10 Language shell

Source: Grepper

Tags: sed variables whatever

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Contributed on Apr 10 2023

Niransha

0 Answers Avg Quality 2/10

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Using double quotes
Use double quotes to make the shell expand variables while preserving whitespace:

sed -i "s/$var1/ZZ/g" "$file"
When you require the quote character in the replacement string, you have to precede it with a backslash which will be interpreted by the shell. In the following example, the string quote me will be replaced by "quote me" (the character & is interpreted by sed):

sed -i "s/quote me/\"&\"/" "$file"
Using single quotes
If you've a lot shell meta-characters, consider using single quotes for the pattern, and double quotes for the variable:

sed -i 's,'"$pattern"',Say hurrah to &: \0/,' "$file"

Popularity 6/10 Helpfulness 1/10 Language shell

Source: askubuntu.com

Tags: shell sed

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Contributed on Aug 21 2023

DreamCoder

0 Answers Avg Quality 2/10

sed variables

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