I've successfully used the following sed command to search/replace text in Linux:
sed -i 's/old_link/new_link/g' * However, when I try it on my Mac OS X, I get:
"command c expects \ followed by text"
I thought my Mac runs a normal BASH shell. What's up?
EDIT:
According to @High Performance, this is due to Mac sed being of a different (BSD) flavor, so my question would therefore be how do I replicate this command in BSD sed?
EDIT:
Here is an actual example that causes this:
sed -i 's/hello/gbye/g' * 13 Answers
If you use the -i option you need to provide an extension for your backups.
If you have:
File1.txt File2.cfg The command (note the lack of space between -i and '' and the -e to make it work on new versions of Mac and on GNU):
sed -i'.original' -e 's/old_link/new_link/g' * Create 2 backup files like:
File1.txt.original File2.cfg.original There is no portable way to avoid making backup files because it is impossible to find a mix of sed commands that works on all cases:
sed -i -e ...- does not work on OS X as it creates-ebackupssed -i'' -e ...- does not work on OS X 10.6 but works on 10.9+sed -i '' -e ...- not working on GNU
Note Given that there isn't a sed command working on all platforms, you can try to use another command to achieve the same result.
E.g., perl -i -pe's/old_link/new_link/g' *
I believe on OS X when you use -i an extension for the backup files is required. Try:
sed -i .bak 's/hello/gbye/g' * Using GNU sed the extension is optional.
This works with both GNU and BSD versions of sed:
sed -i'' -e 's/old_link/new_link/g' * or with backup:
sed -i'.bak' -e 's/old_link/new_link/g' * Note missing space after -i option! (Necessary for GNU sed)
Had the same problem in Mac and solved it with brew:
brew install gnu-sed and use as
gsed SED_COMMAND you can set as well set sed as alias to gsed (if you want):
alias sed=gsed Or, you can install the GNU version of sed in your Mac, called gsed, and use it using the standard Linux syntax.
For that, install gsed using ports (if you don't have it, get it at http://www.macports.org/) by running sudo port install gsed. Then, you can run sed -i 's/old_link/new_link/g' *
Your Mac does indeed run a BASH shell, but this is more a question of which implementation of sed you are dealing with. On a Mac sed comes from BSD and is subtly different from the sed you might find on a typical Linux box. I suggest you man sed.
Sinetris' answer is right, but I use this with find command to be more specific about what files I want to change. In general this should work (tested on osx /bin/bash):
find . -name "*.smth" -exec sed -i '' 's/text1/text2/g' {} \; In general when using sed without find in complex projects is less efficient.
Insead of calling sed with sed, I do ./bin/sed
And this is the wrapper script in my ~/project/bin/sed
#!/bin/bash if [[ "$OSTYPE" == "darwin"* ]]; then exec "gsed" "$@" else exec "sed" "$@" fi Don't forget to chmod 755 the wrapper script.
I've created a function to handle sed difference between MacOS (tested on MacOS 10.12) and other OS:
OS=`uname` # $(replace_in_file pattern file) function replace_in_file() { if [ "$OS" = 'Darwin' ]; then # for MacOS sed -i '' -e "$1" "$2" else # for Linux and Windows sed -i'' -e "$1" "$2" fi } Usage:
$(replace_in_file 's,MASTER_HOST.*,MASTER_HOST='"$MASTER_IP"',' "./mysql/.env") Where:
, is a delimeter
's,MASTER_HOST.*,MASTER_HOST='"$MASTER_IP"',' is pattern
"./mysql/.env" is path to file
Here's how to apply environment variables to template file (no backup need).
1. Create template with {{FOO}} for later replace.
echo "Hello {{FOO}}" > foo.conf.tmpl 2. Replace {{FOO}} with FOO variable and output to new foo.conf file
FOO="world" && sed -e "s/{{FOO}}/$FOO/g" foo.conf.tmpl > foo.conf Working both macOS 10.12.4 and Ubuntu 14.04.5
Here is an option in bash scripts:
#!/bin/bash GO_OS=${GO_OS:-"linux"} function detect_os { # Detect the OS name case "$(uname -s)" in Darwin) host_os=darwin ;; Linux) host_os=linux ;; *) echo "Unsupported host OS. Must be Linux or Mac OS X." >&2 exit 1 ;; esac GO_OS="${host_os}" } detect_os if [ "${GO_OS}" == "darwin" ]; then sed -i '' -e ... else sed -i -e ... fi As the other answers indicate, there is not a way to use sed portably across OS X and Linux without making backup files. So, I instead used this Ruby one-liner to do so:
ruby -pi -e "sub(/ $/, '')" ./config/locales/*.yml In my case, I needed to call it from a rake task (i.e., inside a Ruby script), so I used this additional level of quoting:
sh %q{ruby -pi -e "sub(/ $/, '')" ./config/locales/*.yml} sed -ie 's/old_link/new_link/g' * Works on both BSD & Linux with gnu sed
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