hi ,
m new to sed and awk. can anyone tell me how to alter the old file permanenetly using sed.
e.g.
$sed 's/cat/dog/g' old_file
the above command will replace all the occrance of cat by dog in the file called old_file and by default will show the output at stdout.
so is there anyway of... (2 Replies)
Hello All,
Im opening a file desciptor in perl and sending data using print CMD "$xyz".
is there a limit to the length of the string that I can give to this CMD at a time. (3 Replies)
I have some zip files. Every file has a "folder/xml file" inside it. Is there any way to change these zip files directly without unzipping them. I want to convert these zip files to "/xml file" (want to move the xml file/s one root up by removing the folder inside it.)
Ex:
-bash-3.00$ for file... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
My first question pertains to the adding a book section, I'm unsure which command or conditional statement I... (0 Replies)
Hi ,
I have data in file like below.
status ----------- ------ 2287 C 1502 E 19
can anyone pls help me how can i get it modified as below
status 2287|C|1502 E|19
can someone pls help.
Thanks. (2 Replies)
Thank u so much .Its working fine as expected.
---------- Post updated at 03:41 PM ---------- Previous update was at 01:46 PM ----------
I need one more help.
I have another file(fixed length) that will get negative value (ex:-00000000003000) in postion (98 - 112) then i have to... (6 Replies)
I have this script:
#!/bin/sh
for file in "$@"
do
ext=${file##*.}
base=${file%.*}
num=${base##*v}
zeroes=${num%%*}
num=${num#$zeroes} #remove leading zeros, or it uses octal
num=$((num+1))
base=${base%v*}
new=$(printf... (4 Replies)
Discussion started by: scribling
4 Replies
LEARN ABOUT DEBIAN
stdin
FD(4) BSD Kernel Interfaces Manual FD(4)NAME
fd, stdin, stdout, stderr -- file descriptor files
DESCRIPTION
The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can be accessed through the file system. If the file descriptor is
open and the mode the file is being opened with is a subset of the mode of the existing descriptor, the call:
fd = open("/dev/fd/0", mode);
and the call:
fd = fcntl(0, F_DUPFD, 0);
are equivalent.
Opening the files /dev/stdin, /dev/stdout and /dev/stderr is equivalent to the following calls:
fd = fcntl(STDIN_FILENO, F_DUPFD, 0);
fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
fd = fcntl(STDERR_FILENO, F_DUPFD, 0);
Flags to the open(2) call other than O_RDONLY, O_WRONLY and O_RDWR are ignored.
IMPLEMENTATION NOTES
By default, /dev/fd is provided by devfs(5), which provides nodes for the first three file descriptors. Some sites may require nodes for
additional file descriptors; these can be made available by mounting fdescfs(5) on /dev/fd.
FILES
/dev/fd/#
/dev/stdin
/dev/stdout
/dev/stderr
SEE ALSO tty(4), devfs(5), fdescfs(5)BSD June 9, 1993 BSD