11-01-2008
Cant we do something like this?
sed -n -e '/<log logid="8423b5ae190810252359350480/1/1">/d' file.txt > file.txt
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi there guys,
wonder if any gurus can help me out on this one...
try searching the past threads but cant find anything.
i have this huge file but when i use vi to open it it gives me the following error:
<"pmrepserver.txt""/var/tmp/Ex86200" There is not enough space in the file... (7 Replies)
Discussion started by: lweegp
7 Replies
2. Shell Programming and Scripting
Hi,
Could someone tell me how to delete a particular text inside an existing file without opening the file?
e.g. I have a text file called mytext.txt which contains three lines of text below and I want to delete “ ;” and delete the second line “b ;” including the carriage return.
a ;
b ;
c ;... (12 Replies)
Discussion started by: stevefox
12 Replies
3. UNIX for Dummies Questions & Answers
Hi
To delete some text in 2 files in line1 ( not complete line) in unix without opening the files.
For example: source file is like this
<?xml version="1.0"... (5 Replies)
Discussion started by: pyaranoid
5 Replies
4. Shell Programming and Scripting
I have a control file which looks like this
LOAD DATA
INFILE '/array/data/data_Finished_T5_col_change/home/oracle/emp.dat'
PRESERVE BLANKS
INTO TABLE SCOTT.EMP
FIELDS TERMINATED BY '|' OPTIONALLY ENCLOSED BY '"' TRAILING NULLCOLS
(.................
..................)
How can i edit the... (1 Reply)
Discussion started by: mwrg
1 Replies
5. Shell Programming and Scripting
awk '!(/^$/||/--/||/selected/||/^ *$/){print "A." $1 " <> B." $1 " or"}' infile
my AWK out put is :
A.KZ <> B.KZ or
A.KZT <> B.KZT or
A.KZ_Z <> B.KZ_Z or
A.LH <> B.LH or
A.MAN<> B.MAN or
A.OBJEKT <> B.OBJECT or
A.PAK <> B.PAK ;
is there any way to controle AWK to not print the... (1 Reply)
Discussion started by: kanakaraju
1 Replies
6. Shell Programming and Scripting
Hi,
1_strings file contains
$ cat 1_strings
/home/$USER/Src
/home/Valid
/home/Review$ cat myxml
<projected value="some string" path="/home/$USER/Src">
<input 1/>
<estimate value/>
<somestring/>
</projected>
<few more lines >
<projected value="some string" path="/home/$USER/check">... (4 Replies)
Discussion started by: greet_sed
4 Replies
7. UNIX for Dummies Questions & Answers
Hi , I am breaking my head from past one day ...to delete lines from a file which match to the string pattern.:wall:
I am storing the search string in a variable and search if the file exists in the folder,if not delete that entry from the file.
I am having problem to delete that line from... (2 Replies)
Discussion started by: rashmisb
2 Replies
8. Shell Programming and Scripting
Hi all
i want to write program with shell script that able compare two file content and if one of lines of file have # at the first of string or nothing find same string in one of two file . remove the line in second file that have not the string in first file. for example:
file... (2 Replies)
Discussion started by: saleh67
2 Replies
9. UNIX for Dummies Questions & Answers
I have file called "text". The contents are as below :
aaa
bbb
ccc
ddd
eee
ffff
ddd
hhhh
iiii
I want to read this file without opening and and delete the last line. How can it be done? (4 Replies)
Discussion started by: the_hunter
4 Replies
10. UNIX for Dummies Questions & Answers
Hi Everyone,
I have a requirement in ksh where i have a set of files in a directory. I need to search each and every file if a particular string is present in the file, delete that line and replace that line with another string expression in the same file.
I am very new to unix. Kindly help... (10 Replies)
Discussion started by: Pradhikshan
10 Replies
FIFO(7) Linux Programmer's Manual FIFO(7)
NAME
fifo - first-in first-out special file, named pipe
DESCRIPTION
A FIFO special file (a named pipe) is similar to a pipe, except that it is accessed as part of the file system. It can be opened by multi-
ple processes for reading or writing. When processes are exchanging data via the FIFO, the kernel passes all data internally without writ-
ing it to the file system. Thus, the FIFO special file has no contents on the file system; the file system entry merely serves as a refer-
ence point so that processes can access the pipe using a name in the file system.
The kernel maintains exactly one pipe object for each FIFO special file that is opened by at least one process. The FIFO must be opened on
both ends (reading and writing) before data can be passed. Normally, opening the FIFO blocks until the other end is opened also.
A process can open a FIFO in nonblocking mode. In this case, opening for read only will succeed even if no-one has opened on the write
side yet, opening for write only will fail with ENXIO (no such device or address) unless the other end has already been opened.
Under Linux, opening a FIFO for read and write will succeed both in blocking and nonblocking mode. POSIX leaves this behavior undefined.
This can be used to open a FIFO for writing while there are no readers available. A process that uses both ends of the connection in order
to communicate with itself should be very careful to avoid deadlocks.
NOTES
When a process tries to write to a FIFO that is not opened for read on the other side, the process is sent a SIGPIPE signal.
FIFO special files can be created by mkfifo(3), and are indicated by ls -l with the file type 'p'.
SEE ALSO
mkfifo(1), open(2), pipe(2), sigaction(2), signal(2), socketpair(2), mkfifo(3), pipe(7)
COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-12-03 FIFO(7)