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- regular expression - Using sed to find and replace complex string . . .
Learn how to use sed with regex for complex string replacements in Unix systems
- What is the purpose of -e in sed command? - Unix Linux Stack Exchange
In your example sed 's foo bar ' and sed -e 's foo bar ' are equivalent In both cases s foo bar is the script that is executed by sed The second option is more explicit, but that is probably not the reason that you often see -e used The reason for that is that -e makes it possible to use more than one script with the same invocation of sed
- SED: insert text after the last line? - Unix Linux Stack Exchange
This sed command inserts a tag to the beginning of a file: sed -i "1s ^ lt;?php " file How can I insert something to the end of each file with sed?
- What does sed s [^0-9]* g command mean in unix?
I was going through a Unix shell script where I came across this command: sed 's [^0-9]* g' Could someone explain this?
- sed - How to insert text after a certain string in a file? - Unix . . .
To actually modify the input file you would either use the -i switch if your awk sed support it (consult the manual) or redirect to a temporary file then overwrite the original e g cmd infile > outfile mv outfile infile Or use ed ex which can edit the files in-place on all platforms: ex -s infile <<\IN PATTERN a add one line and one more
- What does sed -i 1d do? - Unix Linux Stack Exchange
I understand that sed is a command to manipulate text file From my Googling, it seems -i means perform the operation on the file itself, is this correct? What about '1d'?
- How can I use sed to replace a multi-line string?
Don't try to use sed for this as it doesn't understand literal strings and so will fail given various characters in your search "string" (a regexp to sed) or replacement string (again, not literal as backreferences are interpreted), see is-it-possible-to-escape-regex-metacharacters-reliably-with-sed Instead use a tool that understands literal strings, e g awk
- Using sed to find and replace - Unix Linux Stack Exchange
875 sed is the s tream ed itor, in that you can use | (pipe) to send standard streams (STDIN and STDOUT specifically) through sed and alter them programmatically on the fly, making it a handy tool in the Unix philosophy tradition; but can edit files directly, too, using the -i parameter mentioned below Consider the following:
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