Gentle Unix users,
Can someone tell me how I can use a combination of the cat and grep command to display records that are in FileA but missing in FileB.
cat FileA one line at a time and grep to see if it is in fileB. If it is ignore.
If line is not in fileB display the line.
Thanks in... (4 Replies)
hello
just i saw a really strange for cat
i have file (file1) contains line /home/rajiv/proj1/*.txt
now applied a commonds
DDPATH="$(cat file1)"
echo $DDPATH
it shows all the txt files in that folder like /home/rajiv/proj1/read1.txt /home/rajiv/proj1/read2.txt... (7 Replies)
Hi Team,
I am trying to add timestamp to SQLs by taking the timestamp in variable through shell script.I started like this.
cat << EOF > $MYDIR
CONNECT TO $MYDB USER $MYUSR USING $MYPWD;
T=`db2 -x "select CURRENT_TIMESTAMP from sysibm.sysdummy1 "`;
DECLARE RECCUR CURSOR FOR... (3 Replies)
Hi All,
I'm hoping this is an easy question, but I'm having a weird problem trying to simply copy and paste text from MS Windows (XP) Notepad and then pasting into vi or vim in AIX. When I type "oslevel" I get "5.3.0.0". The problem is that once the text is pasted, there are sections of text... (2 Replies)
Hi,
when I do cat for kernel parameters
cat /proc/sys/kernel/sem >> /etc/sysctl.conf
4096 4096 32 128
The above command working with out any doubt
but I want to pass it like below, need to append "kernel.sem =" and pass it to /etc/sysctl.conf kernel.sem = 4096... (2 Replies)
I have a directory that is restricted and I cannot just copy the files need, but I can cat them and redirect them to a new directory. The files all have the date listed in them. If I perform a long listing and grep for the date (150620) I can redirect that output to a text file. Now I need to... (5 Replies)
need to login 4 systems to check whether the systems are accessible or not using rlogin command,after each login i will exit.After issuing the command rlogin abc if it is not responding i will get a message of "connection timed out" . So i want to automate this task .so i tried like below :
EX:... (1 Reply)
need to login 4 systems to check whether the systems are accessible or not using rlogin command,after each login i will exit.After issuing the command rlogin abc if it is not responding i will get a message of "connection timed out" . So i want to automate this task .so i tried like below:
EX:
... (3 Replies)
Discussion started by: kankuro9x
3 Replies
LEARN ABOUT MOJAVE
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-benstuv] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command-line order. If
file is a single dash ('-') or absent, cat reads from the standard input. If file is a UNIX domain socket, cat connects to it and then reads
it until EOF. This complements the UNIX domain binding capability available in inetd(8).
The options are as follows:
-b Number the non-blank output lines, starting at 1.
-e Display non-printing characters (see the -v option), and display a dollar sign ('$') at the end of each line.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Display non-printing characters (see the -v option), and display tab characters as '^I'.
-u Disable output buffering.
-v Display 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), more(1), pr(1), sh(1), tail(1), vis(1), zcat(1), setbuf(3)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is compliant with the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-benstv] 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!
The cat utility does not recognize multibyte characters when the -t or -v option is in effect.
BSD March 21, 2004 BSD