Hi
View/Edit a file in unix is quite easy indeed.You may like the following to use
1 cat <file_name>
2 cat><filename>
3 vi <filename>
Note that 1st option is to VIEW file only.You will not be able to write in this mode.
2nd and 3rd options make you enable to edit a file.
Be cautious when you edit a file using 3rd option as it may need a bit more knowledge about VI editor prior to use.
But there is no harm in using the 2nd option mentioned above
thanks .
Suggesting redirecting output from the cat utility to edit a file is an EXTREMELY dangerous suggestion for a new user. The first thing that the command:
does is delete everything in the file named filename. The user then has to retype the exact original contents of every line in the original file except for the changes to be made to the single line that you want to change.
This User Gave Thanks to Don Cragun For This Post:
hi All,
Plz let me know how to edit a file with 2000000 records.
each record contains with 40 field seperated by |.
i want modify 455487 record, but i am uable to edit this large file using vi editor in unix.
plz let me know how to modify this file.
Thanks in advance.
-Bali Reddy (3 Replies)
I am getting the fallowing error when i am trying to execute the scp commomd in shell script
warning: You have no controlling tty. Cannot read confirmation.
warning: Authentication failed.
Disconnected; key exchange or algorithm negotiation failed (Key exchange failed.).
scp2: warning: ssh2... (1 Reply)
Hi,
Can anyone help me. I am a new user in unix. I want to transfer (ftp) a file from one unix server to another server. Kindly help me.
more details:
server 1
file_name a.lst
path: :/temp
server 2
path : /develp/temp
Thanks,
Raj, (2 Replies)
I'm trying to write a Perl script where a file from a UNIX server box connects to a Windows server box and copies that file into the Window box.
The main problem I have right now is that whenever I try to connect to the Windows box, the connection is refused.
The error message that always pops... (2 Replies)
Is it possible to upload a file from unix server to sharepoint server through shell or perl scripting. I have the sharepoint link where it needs to be uploaded.
Could you please share your views on this ? (0 Replies)
Dear All,
Can someone help to command or program to transfer the file from windows to Unix server and from one unix server to another Unix server in secure way.
I would request no samba client. (4 Replies)
HI Guys,
I want to download files from FTP Server to my Unix server.
I have tried , buy No Luck .
Below Command i have tried.
1-Wget - Error "wget' not found"
2.ftp -n $HOST ...Not Working.
3.scp -i ftp://user:passowrd@hostname:21/ran/on/test.txt
Any Suggestion (2 Replies)
Hello, I'm working with Solaris and I need to share files between Windows Server 2012 and Solaris through an authentication with an Active Directory user, where Windows Server is the "main server". All was going good, until after see the WS files and I tried to open one and modify it, but I cannot... (1 Reply)
Discussion started by: QeratD0
1 Replies
LEARN ABOUT NETBSD
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-beflnstuv] [-] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command line order. A
single dash represents the standard input, and may appear multiple times in the file list.
The word ``concatenate'' is just a verbose synonym for ``catenate''.
The options are as follows:
-b Implies the -n option but doesn't number blank lines.
-e Implies the -v option, and displays a dollar sign ('$') at the end of each line as well.
-f Only attempt to display regular files.
-l Set an exclusive advisory lock on the standard output file descriptor. This lock is set using fcntl(2) with the F_SETLKW command.
If the output file is already locked, cat will block until the lock is acquired.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Implies the -v option, and displays tab characters as '^I' as well.
-u The -u option guarantees that the output is unbuffered.
-v Displays non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ascii characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), hexdump(1), lpr(1), more(1), pr(1), tail(1), view(1), vis(1), fcntl(2)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is expected to conform to the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-belnstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed! This is performed by the shell before cat is run.
BSD September 23, 2006 BSD