Working within a directory of two thousand plus of text files, I need to replace a certain string in each of those text files from "template.cmp" into "actualfilename". For example, for a file like mdgen.cmp, I need the original string of "template.cmp" to be changed to "mdgen".
I have tried the following command to no avail:
sed -i 's/template.cmp/$(basename)' ./*
Any idea how I can get around this?
Inside single quotes, $(basename) is just a static string. If you want to run the command basename, you need double quotes, and you need to pass it an argument, or two arguments if you want to trim the extension. Guessing a bit what you are actually trying to do, something like
for file in *; do
sed -i "s/template\.cmp/$(basename "$file" .cmp)/" "$file"
done
Notice also how the dot in the regex should properly be escaped with a backslash or by putting it in a character class [.]; an unescaped . matches any character at all.
Related
I am trying to use 'sed' to replace a list of paths in a file with another path.
An example string to process is:
/path/to/file/block
I want to replace /path/to/file with something else.
I have Tried
sed -r '/\s(\S+)\/block/s/\1/new_path/'
I know it's finding the matching string but I'm getting an invalid back reference error.
How can I do this?
This may do:
echo "/path/to/file/block" | sed -r 's|/\S*/(block)|/newpath/\1|'
/newpath/block
Test
echo "test=/path/file test2=/path/to/file/block test3=/home/root/file" | sed -r 's|/\S*/(block)|/newpath/\1|'
test=/path/file test2=/newpath/block test3=/home/root/file
Back-references always refer to the pattern of the s command, not to any address (before the command).
However, in this case, there's no need for addressing: we can apply the substitution to all lines (and it will change only lines where it matches), so we can write:
s,\s(\S+)/block/, \1/new_path,
(I added a space to the RHS, as I'm guessing you didn't mean to overwrite that; also used a different separator to reduce the need for backslashes.)
I know this should be straight forward but I'm stuck, sorry.
I have two files both contain the same parameters but with different values. I'm trying to read one file line at a time, get the parameter name, use this to match in the second file and replace the whole line with that from file 1.
e.g. rw_2.core.fvbCore.Param.isEnable 1 (FVB_Params)
becomes
rw_2.core.fvbCore.Param.isEnable true (FVB_Boolean)
The lines are not always the same length but I always want to replace the whole line.
The code I have is as follows but it doesn't make the substitutions and I can't work out why not.
while read line; do
ParamName=`awk '{print $1}'`
sed -i 's/$ParamName.*/$line/g' FVB_Params.txt
done < FVB_Boolean.txt
You need your sed command within double quotes if you want those variables to be replaced with their values. You have single quotes, so sed is actually looking for strings with dollar signs to replace with the string '$line', not whatever your shell has in the $line variable.
In short, sed's not seeing the values you want. Switch to double quotes.
sed is still giving me headaches, so a little help is extremely appreciated.
In a file I have a string like:
SOME_TEXT="variables"
What I want to accomplish is to add a piece of text (variable) to either the end or the begging of the string for that text.
I tried to use variations of:
sed -i '/^SOME_TEXT="/ s/$/ SOME_TEXT="new text'/' filename
but that is failing, so clearly the quota for the string I want to add to is messing up the syntax.
LE:
A variation further is that I have a variable that I want to use as the replace in that syntax, so I have this:
sed -i "s/^SOME_TEXT="/SOME_TEXT=" $variable/" file
This actually produces this output, as it picks up incorrectly the opening/closing quotas:
SOME_TEXT = text_variable" initial text continuation
So how can I properly close the trailing quota so that I can use the variable after it?
I used
sed 's/^SOME_TEXT="/SOME_TEXT="new text/' filename
and it showed:
SOME_TEXT="new textvariables"
Is that what you want?
Escape the '"' characters with a '\' so that they don't terminate your regex string.
sed -i "s/^TEXT=\"/TEXT=\" $variable/"
I'm processing a text file reading line by line and massaging/filtering the data before writing to another file. Some lines in the original file contain multiple double quotes, others don't:
Dummy line 'from' a file with ""multiple double"" """quotes""" and single double "quotes".
I want to preserve all those weird quotes, basically treat the whole line as raw data. However, currently my approach removes all instances of double quotes
while read -r line
do
# do some filtering
echo "$line">> $ebooks ;;
done < $filename
I assume sed can help with that, but it seems that even if I insert sed substitution after echo "$line", echo would already have already removed all quotes. How to apply sed without echo or what is a good approach for such issues?
Please, POSIX compliant only (sh) solutions, no bash/zsh/csh/etc.
I need to replace text with single quotes with sed and I can't get it to work. Here is my code; can you help me?
I have a text file with this format:
#sometext
$configuration_TEstbk2_bk2_environment12 = 'lalala'
$configuration_TEstbk2_bk2_envoronment12 = 'lalala1'
$configuration_TEstbk2_bk2_staging12 = 'BACKUP 2'
$configuration_waq4faw4f_q4fq4qg4f = 'r234rq43rq4rqr'
$configuration_alice_StagingTEstBk_bk = 'testebk'
$configuration_deployment_overlays_alice_TEStStngDir = 'some'
$configuration_arefgqrqgrq_341q34tq34t = '134t135'
And I need to do something like:
sed s/$configuration_arefgqrqgrq_341q34tq34t ='134t135'/$configuration_arefgqrqgrq_341q34tq34t = 'NEWVALUE'/g
I have tried with many combinations with sed but I can't find one that works.
Would this work for you?
sed "/\$config_deployment_overlays_alice_arefgqrqgrq_341q34tq34t_staging/s/'134t135'/'NEWVALUE'/" file
I'd probably use:
sed '/$configuration_arefgqrqgrq_341q34tq34t *=/'"s/'134t135'/'NEWVALUE'/"
This uses a mix of single quotes and double quotes at the shell level to get the correct information to sed. The single quotes enclose the search condition for the lines containing $configuration_arefgqrqgrq_341q34tq34t followed by some blanks and an equals sign. This avoids the shell expanding what might be a shell variable name (but probably isn't, so the empty string would be substituted). I then switch to double quotes at the shell level, so that sed gets to see the single quotes: it substitutes the value in single quotes with the replacement value, but only on those lines that contain the given configuration parameter name.
I hope users never have to type those configuration parameter names.
I suppose your problem is with the quoting. You could use complex quoting to make sure everything is in single quotes, except the single quotes which need to be in double quotes:
sed 's/$configuration_arefgqrqgrq_341q34tq34t *= *'"'134t135'"'/$configuration_arefgqrqgrq_341q34tq34t = '"'NEWVALUE'/g"
... or you could use some temporary variables to make the whole thing more readable, and suitable for inclusion in a single pair of double quotes:
directive='$configuration_arefgqrqgrq_341q34tq34t'
oldvalue="'134t135'"
newvalue="'NEWVALUE'"
sed "s/$directive *= *$oldvalue/$directive = $newvalue/g"
(If you only expect one match, the /g flag is superfluous.)
You can also totally avoid matching quotes by capturing them:
sed '/$configuration_arefgqrqgrq_341q34tq34t/{
s/\(= *.\).*\(.\) *$/\1NEWVALUE\2/
}' input
This might work for you (GNU sed):
sed -r 's/^(\$\S+\s=\s'\'').*('\'')/\1NEWVALUE\2/' file