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Top Forums UNIX for Dummies Questions & Answers How to use 'sed' to search and replace? Post 302495594 by methyl on Thursday 10th of February 2011 04:54:11 PM
Old 02-10-2011
Quote:
sed 's/145.D25.D558/215.22.45.DW/' (the file name)
Let's escape the period characters to stop "sed" interpreting them and give it a global "g" parameter.
Code:
sed "s/145\.D25\.D558/215\.22.45\.DW/g" (the file name)

This is a big guess because you have not mentioned what Operating System and Shell you have or provided sample input and expected output. Phrases like "but it did not work.. " need qualification with a visual description of what you expected and what actually happened accompanied by any error messages presented exactly as they appear.
Vague statements like "a very big file" are worthless. Exactly to the byte how big is this file?
 

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strccpy(3GEN)					     String Pattern-Matching Library Functions					     strccpy(3GEN)

NAME
strccpy, streadd, strcadd, strecpy - copy strings, compressing or expanding escape codes SYNOPSIS
cc [ flag ... ] file ... -lgen [ library ... ] #include <libgen.h> char *strccpy(char *output, const char *input); char *strcadd(char *output, const char *input); char *strecpy(char *output, const char *input, const char *exceptions); char *streadd(char *output, const char *input, const char *exceptions); DESCRIPTION
strccpy() copies the input string, up to a null byte, to the output string, compressing the C-language escape sequences (for example, , 01) to the equivalent character. A null byte is appended to the output. The output argument must point to a space big enough to accommo- date the result. If it is as big as the space pointed to by input it is guaranteed to be big enough. strccpy() returns the output argument. strcadd() is identical to strccpy(), except that it returns the pointer to the null byte that terminates the output. strecpy() copies the input string, up to a null byte, to the output string, expanding non-graphic characters to their equivalent C-language escape sequences (for example, , 01). The output argument must point to a space big enough to accommodate the result; four times the space pointed to by input is guaranteed to be big enough (each character could become and 3 digits). Characters in the exceptions string are not expanded. The exceptions argument may be zero, meaning all non-graphic characters are expanded. strecpy() returns the output argument. streadd() is identical to strecpy(), except that it returns the pointer to the null byte that terminates the output. EXAMPLES
Example 1: Example of expanding and compressing escape codes. /* expand all but newline and tab */ strecpy( output, input, " " ); /* concatenate and compress several strings */ cp = strcadd( output, input1 ); cp = strcadd( cp, input2 ); cp = strcadd( cp, input3 ); ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
string(3C), strfind(3GEN), attributes(5) NOTES
When compiling multi-thread applications, the _REENTRANT flag must be defined on the compile line. This flag should only be used in multi- thread applications. SunOS 5.10 29 Dec 1996 strccpy(3GEN)
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