10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi
I have a question on appending and deleting entries in mysql table.
This is my sample table. table name: details
id_name | model | mode | media| first | end | id | level |
+--------------------+-------+---------+-----+-------+-------+--------+--------+
| PSK_30s1207681L002 | -1 | 1... (7 Replies)
Discussion started by: rsi.245
7 Replies
2. Shell Programming and Scripting
im trying to append to the end of the line using sed but I want to do it without creating a new line
the text to which I want to append is all in capital letters.
I want to do something like this:
LINE]Foo
but when I do this:
//a\
] Foo
it prints foo on a new line:
LINE
]Foo
... (11 Replies)
Discussion started by: mrjavoman
11 Replies
3. Shell Programming and Scripting
I am trying to replace in multiple files every instance of text that begins with http and add hyperlink characters to it. I can get it to work with the following:sed -e "s/http*.*/<a href=\"&\">&<\/a>/g" *
as long as the http text is at the end of the file. I need it to stop at the end of the... (2 Replies)
Discussion started by: numele
2 Replies
4. Shell Programming and Scripting
Input:
gstreamer-plugins-good
gstreamer-plugins-bad
gstreamer-plugins-ugly
Output should be:
gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly
How can it be done with sed? (5 Replies)
Discussion started by: cola
5 Replies
5. Shell Programming and Scripting
Hi friends,
I have a file with content SOME TEXT HERE
I want to append the string GREAT to Line 1 of my file such that the file content should be
GREAT
SOME TEXT HERE
I can do a cat for the string great and file >> newfile and then rename newfile name to file
But this does not put... (5 Replies)
Discussion started by: dahlia84
5 Replies
6. Shell Programming and Scripting
hi,
anyone can give a sample command on sed. the text file date list belows;
test.txt
"a","bbb",123
"b","ccc",234
"c","eee",456
output i need to add these word "xxx"
"xxx","a","bbb",123
"xxx","b","ccc",234
"xxx" ,"c","eee",456
thanks in advance,
FSP (4 Replies)
Discussion started by: fspalero
4 Replies
7. Shell Programming and Scripting
Hello all,
I want to use sed to append a variable stored in $i, how do i do that?
$i contains a path to a directory and i want to append it before the result i get from awk statement, before affecting awk results.
rite now out put i get from code below is:-
The path is:... (2 Replies)
Discussion started by: asirohi
2 Replies
8. Shell Programming and Scripting
I have the following data in a file and would like to append the lines inside each section 10, 20, 30, 40, etc... onto one line for each of the sections. Is it possible with SED to make this happen??
10 00039393 DOCK: RECEIVE PART, TAG. D D
... (3 Replies)
Discussion started by: miklacic
3 Replies
9. Shell Programming and Scripting
Hi,
i need to replace hyphen with underscore in a string and also append some text before it.
e.g. if the string is 130707-abc-123.txt then it has to be made UB130707_abc_123.txt.
Also, need help on how to do it on many strings exist in a file.
I know it can be done by using sed but it... (4 Replies)
Discussion started by: prvnrk
4 Replies
10. Shell Programming and Scripting
I want to write a sed command that does the following work:
file: <a>asdfasdf<\s>
<line>hello</line>
<b>adf<\c>
<b>tttttttt<\c>
output:
name=hello
sed -e 's/^*//' -n -e '/<line>/s/<*>//gp;' -e 's/^/name="/g' file
but I can not append "=" after getting the line with... (5 Replies)
Discussion started by: minifish
5 Replies
SED(1) General Commands Manual SED(1)
NAME
sed - stream editor
SYNOPSIS
sed [ -gln ] [ -e script ] [ -f sfile ] [ file ... ]
DESCRIPTION
Sed copies the named files (standard input default) to the standard output, edited according to a script of commands. The -f option causes
the script to be taken from file sfile; these options accumulate. If there is just one -e option and no -f's, the flag -e may be omitted.
The -n option suppresses the default output; -g causes all substitutions to be global, as if suffixed g. The -l option causes sed to flush
its output buffer after every newline.
A script consists of editing commands, one per line, of the following form:
[address [, address] ] function [argument ...]
In normal operation sed cyclically copies a line of input into a pattern space (unless there is something left after a command), applies in
sequence all commands whose addresses select that pattern space, and at the end of the script copies the pattern space to the standard out-
put (except under -n) and deletes the pattern space.
An address is either a decimal number that counts input lines cumulatively across files, a that addresses the last line of input, or a con-
text address, /regular-expression/, in the style of regexp(7), with the added convention that matches a newline embedded in the pattern
space.
A command line with no addresses selects every pattern space.
A command line with one address selects each pattern space that matches the address.
A command line with two addresses selects the inclusive range from the first pattern space that matches the first address through the next
pattern space that matches the second. (If the second address is a number less than or equal to the line number first selected, only one
line is selected.) Thereafter the process is repeated, looking again for the first address.
Editing commands can be applied to non-selected pattern spaces by use of the negation function (below).
An argument denoted text consists of one or more lines, all but the last of which end with to hide the newline. Backslashes in text are
treated like backslashes in the replacement string of an command, and may be used to protect initial blanks and tabs against the stripping
that is done on every script line.
An argument denoted rfile or wfile must terminate the command line and must be preceded by exactly one blank. Each wfile is created before
processing begins. There can be at most 120 distinct wfile arguments.
a
text Append. Place text on the output before reading the next input line.
b label Branch to the : command bearing the label. If label is empty, branch to the end of the script.
c
text Change. Delete the pattern space. With 0 or 1 address or at the end of a 2-address range, place text on the output. Start
the next cycle.
d Delete the pattern space. Start the next cycle.
D Delete the initial segment of the pattern space through the first newline. Start the next cycle.
g Replace the contents of the pattern space by the contents of the hold space.
G Append the contents of the hold space to the pattern space.
h Replace the contents of the hold space by the contents of the pattern space.
H Append the contents of the pattern space to the hold space.
i
text Insert. Place text on the standard output.
n Copy the pattern space to the standard output. Replace the pattern space with the next line of input.
N Append the next line of input to the pattern space with an embedded newline. (The current line number changes.)
p Print. Copy the pattern space to the standard output.
P Copy the initial segment of the pattern space through the first newline to the standard output.
q Quit. Branch to the end of the script. Do not start a new cycle.
r rfile Read the contents of rfile. Place them on the output before reading the next input line.
s/regular-expression/replacement/flags
Substitute the replacement string for instances of the regular-expression in the pattern space. Any character may be used
instead of For a fuller description see regexp(7). Flags is zero or more of
g Global. Substitute for all non-overlapping instances of the regular expression rather than just the first one.
p Print the pattern space if a replacement was made.
w wfile
Write. Append the pattern space to wfile if a replacement was made.
t label Test. Branch to the command bearing the label if any substitutions have been made since the most recent reading of an input
line or execution of a If label is empty, branch to the end of the script.
w wfile
Write. Append the pattern space to wfile.
x Exchange the contents of the pattern and hold spaces.
y/string1/string2/
Transform. Replace all occurrences of characters in string1 with the corresponding character in string2. The lengths of
string1 and string2 must be equal.
!function Don't. Apply the function (or group, if function is only to lines not selected by the address(es).
: label This command does nothing; it bears a label for b and t commands to branch to.
= Place the current line number on the standard output as a line.
{ Execute the following commands through a matching only when the pattern space is selected.
An empty command is ignored.
EXAMPLES
sed 10q file
Print the first 10 lines of the file.
sed '/^$/d'
Delete empty lines from standard input.
sed 's/UNIX/& system/g'
Replace every instance of by
sed 's/ *$// drop trailing blanks
/^$/d drop empty lines
s/ */ replace blanks by newlines
/g
/^$/d' chapter*
Print the files chapter1, chapter2, etc. one word to a line.
nroff -ms manuscript | sed '
${
/^$/p if last line of file is empty, print it
}
//N if current line is empty, append next line
/^
$/D' if two lines are empty, delete the first
Delete all but one of each group of empty lines from a formatted manuscript.
SOURCE
/src/cmd/sed.c
SEE ALSO
ed(1), grep(1), awk(1), lex(1), sam(1), regexp(7)
L. E. McMahon, `SED -- A Non-interactive Text Editor', Unix Research System Programmer's Manual, Volume 2.
BUGS
If input is from a pipe, buffering may consume characters beyond a line on which a command is executed.
SED(1)