I'm trying to use the following command to do a batch find and replace in all commonly named files through a file hierarchy
find . -name 'file' |xargs perl -pi -e 's/find/replace/g'
which works fine except for a substitution involving parenthesis.
As a specific example I'm trying to sub... (3 Replies)
Hi
I would like to replace a comma in parentheses to a semicolon for example. Other commas outside () stay unchanged. How can I do this?
aaaa,bbb,ccc,ddd(eee,fff,ggg),hhh,iii
to
aaaa,bbb,ccc,ddd(eee;fff;ggg),hhh,iii
Thanks (5 Replies)
hi, unix gurus.
i am wondering if someone can give me a clear explanation of the differneces between parentheses and brackets, both single and double.
i have heard that double parentheses (( are used for numerical expressions and that single brackets [ are used for strings. but i see... (1 Reply)
Hello,
I have done a great deal of research on this and still cannot come to an understanding of the following:
In if-else statements in shell scripting I have seen examples of single brackets, double brackets, single parantheses, and double paratheses. When should each one be used?
And... (2 Replies)
Hi
I have a file with numbers like this :
123
456
6798
9073233
12
8644
Now, I need to insert parentheses to each and every line like below :
(123)
(456)
(6798)
(9073233)
(12)
(8644)
can anyone tell me a solution? (8 Replies)
Hi,
I tried to adapt bartus's solution to my problem, without success. I want to replace all the occurences of this:
with:
, where something can contain an arbitrary number of balanced parens and brakets.
Any ideas ?
Best, (1 Reply)
I was looking at a script in my little book on bash and saw that one of the if statements had parentheses instead of brackets for the condition. I've been trying to find in my book where it talks about parentheses (because the examples on the if statement in an earlier chapter doesn't seem to... (3 Replies)
This is my input file:
a|b|c(ef)|g|h(km)|p
My output file should look like:
a|b|ef|g|km|p
That is, pipe is the delimiter. The data within pipe must be displayed as it is but if it encounters any data within parentheses, then only the data within parentheses has to be displayed ( the data... (2 Replies)
How to remove first pair of parentheses and content in them from the beginning of the line?
Here's the list:
(ok)-test
(ok)-test-(ing)
(some)-test-(ing)-test
test-(ing)
Desired result:
test
test-(ing)
test-(ing)-test
test-(ing)
Here's what I already tried with GNU sed:
sed -e... (6 Replies)
Suppose I have this code :
int main () { int i = NULL; /* incorrect */ return 0; }
and I want to put the word between the two parentheses
like this :
int main (void) { int i = NULL; /* incorrect */ return 0; }
which command is used to do it in Linux ? (2 Replies)
Discussion started by: steve120
2 Replies
LEARN ABOUT FREEBSD
ddb
DDB(8) BSD System Manager's Manual DDB(8)NAME
ddb -- configure DDB kernel debugger properties
SYNOPSIS
ddb capture [-M -core] [-N -system] print
ddb capture [-M -core] [-N -system] status
ddb script scriptname
ddb script scriptname=script
ddb scripts
ddb unscript scriptname
ddb pathname
DESCRIPTION
The ddb utility configures certain aspects of the ddb(4) kernel debugger from user space that are not configured at compile-time or easily
via sysctl(8) MIB entries.
To ease configuration, commands can be put in a file which is processed using ddb as shown in the last synopsis line. An absolute pathname
must be used. The file will be read line by line and applied as arguments to the ddb utility. Whitespace at the beginning of lines will be
ignored as will lines where the first non-whitespace character is '#'.
OUTPUT CAPTURE
The ddb utility can be used to extract the contents of the ddb(4) output capture buffer of the current live kernel, or from the crash dump of
a kernel on disk. The following debugger commands are available from the command line:
capture [-M core] [-N system] print
Print the current contents of the ddb(4) output capture buffer.
capture [-M core] [-N system] status
Print the current status of the ddb(4) output capture buffer.
SCRIPTING
The ddb utility can be used to configure aspects of ddb(4) scripting from user space; scripting support is described in more detail in
ddb(4). Each of the debugger commands is available from the command line:
script scriptname
Print the script named scriptname.
script scriptname=script
Define a script named scriptname. As many scripts contain characters interpreted in special ways by the shell, it is advisable to
enclose script in quotes.
scripts
List currently defined scripts.
unscript scriptname
Delete the script named scriptname.
EXIT STATUS
The ddb utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal:
ddb script kdb.enter.break="show pcpu; bt"
The following example will delete the script:
ddb unscript kdb.enter.break
For further examples, see the ddb(4) and textdump(4) manual pages.
SEE ALSO ddb(4), textdump(4), sysctl(8)HISTORY
The ddb utility first appeared in FreeBSD 7.1.
AUTHORS
Robert N M Watson
BUGS
Ideally, ddb would not exist, as all pertinent aspects of ddb(4) could be configured directly via sysctl(8).
BSD December 24, 2008 BSD