用于替换“with”的UNIX Sed命令

Question

My file test.csv contain Record `Ashish` . I want to globally replace it with single quote 'Ashish' .

I tried this command:

sed 's/`/'/g' test.csv 

but it is not working. Please advise.

Answer 1

tr是替换字符的正确工具：

echo '`' | tr \` \'

Answer 2

Try using double quotes " on the outside and escaping the backtic.

sed "s/\`/'/g" Test.in > Test.out

Also, if you want to change the original file, you have to use the -i flag.

sed -i "s/\`/'/g" Test.in 

Answer 3

你需要转义'和`字符：

sed s/\'/\`/g test.csv > out.csv

Answer 4

The reason that fails is because it is not possible to place a single quote in a single quoted string: https://www.gnu.org/software/bash/manual/bashref.html#Single-Quotes

The workaround is this:

• sed 's/`/'"'"'/g'
  • concatenate a single-quoted string ( 's/`/' ) with a double-quoted string ( "'" ) and another single-quoted string ( '/g' ), or
• sed 's/`/'\\''/g'
  • concatenate a single-quoted string with a literal single quote and another single-quoted string, or
• other quoting strategies given in other answers