Hi
I was wondering if anyone knew the answer to this question?
I am trying to find a way of executing a command if a certain file is created in the same directory.
One way I thought about doing this was to create a FORTRAN program that continually searches for this file. If the file... (8 Replies)
Hey all,
How do I execute a file at startup automatically.
From what I've read is that I need to put it into my .bashrc file. I'm not sure where to go from there. Can I just type commands into that and they'll run next time I restart my server?
Right now I have added these lines:
cd... (2 Replies)
Hello,
I've been trying to run 'ls -1R | wc -l' inside of sub directories to in order to determine how big each folder is.
find . -maxdepth 1 -type d | while read folder
do
cd "$folder" &&
echo "$folder has $(ls -1R | wc -l) files" &&
cd ..
done
or
for... (3 Replies)
Basically what i'm trying to do is execute an update command and at the same time have the system do a TCPdump to file for that update traffic.
So I would like to connect the two commands so that the tcpdump terminates automatically when the update finishes/fails/whatever.
Right now I have... (0 Replies)
Hi,
I am executing below script
s1=`pwd`
s2=/space
if
then
echo "done"
else
echo "mistake"
cd /tmp
fi
I am not able to migrate to /tmp directory if the condition is not true.However mistake is being printed.Means cd command is not working here.All other commands except cd are... (3 Replies)
Hi All,
I am trying to execute a command using ssh as below.
ssh user123@servername "which ctmcontb"
It is gving the error as below
no ctmcontb in /usr/bin /usr/sbin /opt/sysadm/bin
Not sure from where the PATH is getting picked up.
But When I login direclty to the server I am... (5 Replies)
Hello Guys,
I am studying RBAC. So I create a role called sysadm and gave it the "shutdown" profile.
Now when I switch to that role, and execute the shutdown command
$ shutdown -y -g0 -i5
The system responds with :
shutdown: not found
Can anyone help me with this please?... (1 Reply)
Hi,
I have this command in a shell script and I can get it to echo ok, but when I try to execute the command I get a "file not found" error. Which is strange because, if I copy and paste the same command at the cli it works ok.
What am I doing wrong please? (16 Replies)
Hi All,
I am trying to create a shell script which runs on my linux machine.
The requirement is so that,
ade createview xyz -> this steps creates a view
ade useview xyz -> we are entering inside the view
ade begintrans -> begin a transaction
My script has following code :
lets say... (2 Replies)
I'm running CentOS 6.8 and use bash. I would like a warning to appear to the user who runs the command "service httpd restart"
E.g.
# service httpd restart
are you sure y/n
n
#
(or if y, the command executes).
I looked into it a little but am not sure of the best approach. Aliases I ... (1 Reply)
Discussion started by: spacegoose
1 Replies
LEARN ABOUT OPENDARWIN
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 The -u option guarantees that the output is unbuffered.
-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.
DIAGNOSTICS
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!
BSD September 15, 2001 BSD