Does anyone know what the microprograms behind cat (and other commands) are like? In what language are those programs designed? Is their source available somewhere?
No particular reason, just wondering.
I know it's a bit strange... (3 Replies)
hi all
i have some script
echo $$ > process-id
d='cat process-id'
if test-s "TMP"$d then
echo "serv1"
else
echo "serv2"
fi
the variable d should contain the number of the process,
instead of that it contains 'cat process-id'
how shall i do that the d will contain only the number?... (6 Replies)
Hello,
So I sorted my file as I was supposed to:
sort -n -r -k 2 -k 1 file1 | uniq > file2
and when I wrote
> cat file2
in the command line, I got what I was expecting, but in the script itself
...
sort -n -r -k 2 -k 1 averages | uniq > temp
cat file2
It wrote a whole... (21 Replies)
Hello,
I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial... (1 Reply)
I am having problems getting a list of filenames that I want from a directory.
example: I have 3 files - filename.xxx.20110505.123030
filename.yyy.20110505.123030
filename.zzz.20110505.123030
There may be multiple xxx,... (3 Replies)
Can any one guide me how can i accomplish this by script
i continuously receive files via our ftp server into a certain folder is there a way i can take those files cat it to a new file by hour and create a new file when new hour starts? (4 Replies)
Can we concatenate say,
I have a few files prefixing with 2009...
So now i want all the 2009 files into one single file..
Can this be achieved???? (4 Replies)
hello! why this works?
cd /home/user
cat * | ecasound -i stdin -o jack
and this doesn't?
cd /home/user/somedirectory
cat * | ecasound -i stdin -o jack
somedirectory are full with exe files which are the best source for this sort of noise thing (10 Replies)
Apologies, probably a really simple problem:
I've got a text file (nh.txt) with this in it:
user1 email1 email2
user2 email1 email2
etc
With the following basic script:
for tline in $(cat nh.txt)
do
echo "**********"
echo $tline
done
... (3 Replies)
For the command below, I need to understand what exactly the command does and provide an examples for which the output will be saved to file save2... From my understanding, if the file provides an error in the first half of the pipe, it'll save to save1 and will never give an error to save to... (2 Replies)
Discussion started by: ayz649
2 Replies
LEARN ABOUT OSF1
sh
sh(1) General Commands Manual sh(1)NAME
sh - Shell, the standard command language interpreter
DESCRIPTION
[Tru64 UNIX] Tru64 UNIX provides two command interpreters with the name sh. The XCU5.0 and POSIX.2 compliant command interpreter sh is
available in the file /usr/bin/posix/sh and is described in the sh(1p) reference page. The Bourne shell, historically known as sh, is
available in the file /usr/bin/sh and is described in the sh(1b) reference page.
[Tru64 UNIX] Your initial, or login, shell is determined by your entry in the file /etc/passwd. This file can be changed only by your sys-
tem administrator. You must use whatever procedures are in place at your location to have this entry changed.
[Tru64 UNIX] If available on your system, you may use the passwd -s or the chsh commands to change your login shell.
Note
This option is not available if your site manages passwords through the Network Information Service (NIS) facility. Check with your system
administrator.
[Tru64 UNIX] Subsequent shells spawned from the initial shell depend on the value in the environment variable BIN_SH. If this variable is
set to xpg4, the POSIX shell is started. If this variable is set to svr4, an SVR4 compliant version of the shell is started. If this vari-
able is unset, the Bourne shell is started. If this variable is set to any other value, an error is reported and the results are unpre-
dictable. See the EXAMPLES section for information on setting this variable.
NOTES
[Tru64 UNIX] With Tru64 UNIX Version 4.0 the Korn shell, /usr/bin/ksh is the same as the POSIX shell /usr/bin/posix/sh.
RESTRICTIONS
[Tru64 UNIX] The file /etc/shells must include entries for both the POSIX shell /usr/bin/posix/sh and the Bourne shell, /usr/bin/sh. If
this file is incorrect, see your system administrator.
EXAMPLES
Using the Bourne, Korn, or POSIX shell, to set the variable BIN_SH to use the POSIX/ XCU5.0compliant shell, enter: BIN_SH=xpg4 export
BIN_SH Using the Bourne, Korn, or POSIX shell, to set the variable BIN_SH to use the SVR4 compliant shell, enter: BIN_SH=svr4 export BIN_SH
Using the Bourne, Korn, or POSIX shell, to unset the variable BIN_SH, enter: unset BIN_SH Using the C/ shell, to set the variable BIN_SH to
use the POSIX/XCU5.0 compliant shell, enter: setenv BIN_SH xpg4 Using the C/ shell, to set the variable BIN_SH to use the SVR4 compliant
shell, enter: setenv BIN_SH svr4 Using the C/ shell, to unset the variable BIN_SH, enter: unsetenv BIN_SH
FILES
User profile. Contains user information, including the login shell name. Contains the names of available and permitted shells.
SEE ALSO
Commands: csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p), passwd(1)
Files: passwd(4), shells(4)
Standards: standards(5)sh(1)