i'm trying to find and replace a port number in a server file (because all of my collaborators use the same server), so we need different ports... i was trying to use sed like this: sed -i -e '/var port./var port = 3000;/' server.js to change the port from 5000 to 3000. the acutal line of code i'm trying to replace is var port = 5000; in the file server.js when i try to do this on our rhel server (which i do not have root access to) i get this message sed: -e expression #1, char 14: expected newer version of sed
am i just not using the correct regex? or is the server making it inconvenient?
If you are trying to do a find and replace, don't forget to start the command with s. Also, the -e is not necessary (but it shouldn't cause any problems). Older versions of sed do not support the in-place modification of files, so you should overwrite the file yourself:
sed 's/var port.*/var port = 3000;/' server.js > tmp && mv tmp server.js
It may be necessary to make the regular expression more specific but that depends on the content of the rest of the file.
Try the below sed command which was in this s/pattern/replacement/modifier format,
sed -i 's/var port *= *[0-9]\+/var port = 3000/' server.js
If you want to change the specific port number 5000 then use this,
sed -i 's/var port *= *5000/var port = 3000/' server.js
Related
I'm trying to run a sed command on a Windows machine from the command prompt (CMD.exe) but I am struggling to understand the regular expression and how to escape the string properly when running on Windows. Ideally, I want to develop a solution that works across UNIX and Windows.
sed is not available on Windows so I have installed it via the gnuWin32 project which works well.
The unix format for the command is:
sed -i '' -e 's/\\/_next/\\.\\/next/g' out/**.html
Through a process of trial an error I have managed to get this far:
sed -i \'\' -e \'s/\\/_next/\\.\\/next/g\' out/**.html
but I get an error:
sed: -e expression #1, char 27: unterminated address regex
So there's definitely something wrong with my regex, probably the escaping of various parts?
Any ideas how I might go about fixing this?
Update:
I'm getting the code from here where unfortunately only Linux and OSX are covered.
You need to use
sed -i "s/\\/_next/\\.\\/next/g" out/**.html
The Windows GNU sed does not require the '' empty argument after -i option, they can be safely removed.
Also, the sed command in Windows console should be used in double quotes.
For integration tests, I have output that contains full file paths. I want to have my test script replace the user-specific start of the file path (e.g. /Users/uli/) with a generic word (USER_DIR) so that I can compare the files.
The problem, of course, are the slashes in the path. I tried the solutions given here and here, but they don't work for me:
#!/bin/bash
old_path="/Users/uli/"
new_path="USERDIR"
sed -i "s#$old_path#$new_path#g" /Users/uli/Desktop/replacetarget.txt
I get the error
sed: 1: "/Users/uli/Desktop/repl ...": invalid command code u
This is the version of sed that comes with macOS 10.14.6 (it has no --version option and is installed in /usr/bin/, so no idea what exact version).
Update:
I also tried
#!/bin/bash
old_path="/Users/uli/"
old_path=${old_path//\//\\\/}
new_path="USERDIR"
regex="s/$old_path/$new_path/g"
echo $old_path
echo $regex
sed -i $regex /Users/uli/Desktop/replacetarget.txt
But I get the same error. What am I doing wrong?
BSD sed requires an argument following -i (the empty string '' indicates no backup, similar to argumentless -i in GNU sed). As a result, your script is being treated as the backup-file extention, and your input file as the script.
old_path="/Users/uli/"
new_path="USERDIR"
sed -i '' "s#$old_path#$new_path#g" /Users/uli/Desktop/replacetarget.txt
However, sed is a stream editor, based on the file editor ed, so using -i is an indication you are using the wrong tool to begin with. Just use ed.
old_path="/Users/uli/"
new_path="USERDIR"
printf 's#%s#%s#g\nwq\n' "$old_path" "$new_path" | ed /Users/uli/Desktop/replacetarget.txt
Obligatory warning: neither editor is parameterized as such; you are simpling generating the script dynamically, which means it's your responsibility to ensure that the resulting script is valid. (For example, if either parameter contains a ;, it had better be escaped to prevent (s)ed from seeing it as a command separator.)
I need to replace a string in a file on a remote server with this:
ssh username#${TARGETSERVER} -i /path/to/ssh-key perl -p -i -e "s#\$user = \'${SDBUSER}\'\;#\$user = \'${TDBUSER}\'\;#g" ${TARGETDIR}/configuration.php
That would replace the db user on a remote server in a joomla installation, btw.
If I execute that interactively on the remote server with all the variables filled, it IS working.
If I put the above line in a bash script, I get this message and no replacement takes place:
"Substitution pattern not terminated at -e line 1."
Any clue how I can make this work? I've already tried several escapes like \\' and so forth, but I didn't succeed.
Thanks in advance.
BINGO - Got it working:
ssh -T username#${TARGETSERVER} -i /path/to/ssh-key <<EOI
perl -p -i -e "s#\$user = \'${SDBUSER}\'\;#\$user = \'${TDBUSER}\'\;#g" ${TARGETDIR}/configuration.php
exit
EOI
From there, I could add several perl commands so I wouldn't have to have the payload of sshing in each time.
I am trying to search string and replace string in a file. I used the below code:
sed -e 's/{"AP_SESSION_ID"\1\"787"}/{"AP_SESSION_ID"\1\"800"}/g' FILE|tee FILE
but it is not working and the output is like this:
sed: number in \[0-9] invalid
My environment is CYGWIN.
sample file is:
DP_SESSION_ID is a sting for values
DP_SESSION_ID is aplicat
"DP_S42SETTACC_TYPE"\1\"02"
"DP_SAP_CLIENT"\1\"460"
"DP_SAP_COMM_CONNECTION"\1\"JAVA_COMM_TOOL_ANALYZER"
"DP_SAP_CONNECTION"\1\"JAVA_TOOL_ANALYZER"
"DP_SAP_TOOLBI_CONNECTION"\1\"JAVA_TOOLBI_ANALYZER"
"DP_SESSION_ID"\1\"808"
I want search this "DP_SESSION_ID"\1\" sting and replace corresponding number like 808 in file prenatally(windows env), and i wand sing line command in windows bat command or perl command i don't want scrip or program
even i have installed cygwin tool in my server so unix also ok but single line command
server: windows 2008,cygwin x
using tool : datastage server jobs
perl -pi -e 's{" "DP_SESSION_ID"\1\"808 '"}{' "DP_SESSION_ID"\1\"900 '"'"}g' " file name
this code is not working
Please give good solution
You need to "escape" the backslashes by using two in a row:
sed -e 's/{"AP_SESSION_ID"\\1\\"787"}/{"AP_SESSION_ID"\\1\\"800"}/g' FILE|tee FILE
Otherwise the \1 is treated as a backreference, and you have no subgroups (parenthesized expressions) to reference.
Apart from back-slashes, IMO you also need to escape the quotes.
sed -e 's/{\"AP_SESSION_ID\"\\1\\\"787\"}/{\"AP_SESSION_ID\"\\1\\\"800\"}/g' FILE|tee FILE
I am working on building a .sed file to start scripting the setup of multiple apache servers. I am trying to get sed to match the default webmaster email addresses in the .conf file which works great with this egrep. However when I use sed to try and so a substitute search and replace i get no errors back but it also does not do any substituting. I test this by running the same egrep command again.
egrep -o '\b[A-Za-z0-9._%-]+#[A-Za-z0-9.-]+(\.[A-Za-z]{2,4})?\b' /home/test/httpd.conf
returns
admin#your-domain.com
root#localhost
webmaster#dummy-host.example.com
The sed command I'm trying to use is
sed -i '/ServerAdmin/ s/\b[A-Za-z0-9._%-]+#[A-Za-z0-9.-]+(\.[A-Za-z]{2,4})?\b/MY_ADMIN_ADDRESS#gmail.com/g' /home/test/httpd.conf
After running I try and verify the results by running the egrep again and it returns the same 3 email address indicating nothing was replaced.
Don't assume that any two tools use the same regular expression syntax. If you're going to be doing replacements with sed, use sed to test - not egrep. It's easy to use sed as if it were a grep command: sed -ne '/pattern/p'.
sed must be told that it needs to use extended regular expressions using the -r option then making the sed command as follows.
sed -ir '/ServerAdmin/ s/\b[A-Za-z0-9._%-]+#[A-Za-z0-9.-]+(\.[A-Za-z]{2,4})?\b/MY_ADMIN_ADDRESS#gmail.com/g' /home/test/httpd.conf
Much thanks to Kent for pointing out that the address it was missing wasnt following a ServerName