echo doesn't try to translate anything unless you tell it to. You can send arbitrary ASCII characters with echo like
The -e part tells it to convert \x codes into ASCII characters. -n tells it not to apppend a newline.
I also have a suspicion this fd-opening thing is only working because 'echo' is a bash builtin so doesn't need to launch a new process. Try to avoid pipes and such to avoid unexpected problems writing to the serial device..
---------- Post updated at 02:06 PM ---------- Previous update was at 01:59 PM ----------
Did you make a typo? That's not the device you were using before.
I'm trying to unmount a file system, but umount says the device is busy. A fuser -c /myfs tells me that nothing on this fs is in use. Any idea?
Oh, and btw, why isn't my signature beeing displayed? Show user's signature is enabled and I have entered one :/ (10 Replies)
Anyone have any idea why I cannot umount a directory even though fuser shows no process attached to it?
fuser -cu /data/oracle/GMPSHRDM/export
/data/oracle/GMPSHRDM/export:
umount /data/oracle/GMPSHRDM/export
umount: cannot unmount /data/oracle/GMPSHRDM/export : Device busy
umount:... (2 Replies)
Hi,
I'm trying to do a sharity mount to mount a terastation network drive.
I'm getting a Device or resource busy message after my mount command. Please see output below...
# /usr/local/sharity3/bin/sharity mount smb://labbackup01/bakup_data /mnt/labbackup01
Device or resource busy.... (2 Replies)
Ciao a tutti!!!
il mio problema è questo: sto cercando di inviare dei comandi AT da PC a cellulare utilizzando il bluetooth e cygwin e vorrei visualizzare le risposte nella shell bash. Per farlo apro due terminali utilizzando le seguente istruzioni:
xterm &
Sul primo scrivo
cat /dev/ttyS2
... (0 Replies)
Ciao a tutti!!!
il mio problema è questo: sto cercando di inviare dei comandi AT da PC a cellulare utilizzando il bluetooth e cygwin e vorrei visualizzare le risposte nella shell bash. Per farlo apro due terminali utilizzando le seguente istruzioni:
xterm &
Sul primo scrivo
cat /dev/ttyS2
... (1 Reply)
hello to everybody
I have Ubuntu Lucid 10.04 installed on my Desktop and I have a PCI serial card in my computer and it has only one serial port.
Actually I want to use this serial port for the serial communication and for that I executed this command :
$ setserial -g /dev/ttyS
and I... (0 Replies)
Hi Everyone,
I am trying to remove a directory:
$ rm -rf directory_name/
rm: cannot remove `directory_name/filename': Device or resource busy
What does this mean, and why can't I remove these files? I already tried moving into the directory, and removing the files individually, but I... (7 Replies)
Is there a trick to mounting swap in n a lvm? I can't get it to work.
# swapon -va
swapon on /dev/mapper/VG-lv_swap
swapon: /dev/mapper/VG-lv_swap: found swap signature: version 1, page-size 4, same byte order
swapon: /dev/mapper/VG-lv_swap: pagesize=4096, swapsize=4294967296,... (1 Reply)
Hi there
After making a backup copy of it sometimes happens that when I want to unmount an NFS indicates the error:umount: /path_mount busy: Device busy (Error 16)
if I run lsoff, I can not find the process that is blocking the application.
I'm using OpenServer 5.0.2c as one NFS server ... (14 Replies)
Hi,
Unable to make tape backup, please help.
/opt/ignite/bin/make_tape_recovery -a /dev/rmt/?mn -I -v -m tar -x inc_entire=vg00
* Creating local directories for configuration files and archive.
======= 04/25/16 16:28:08 IST Started /opt/ignite/bin/make_tape_recovery.
(Mon... (4 Replies)
Discussion started by: anuragr
4 Replies
LEARN ABOUT SUNOS
echo
echo(1B) SunOS/BSD Compatibility Package Commands echo(1B)NAME
echo - echo arguments to standard output
SYNOPSIS
/usr/ucb/echo [-n] [argument]
DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.
echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
ronment variables.
For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:
o echo your current-working-directory's full pathname
o pipe the output through tr to translate the path's embedded slash-characters into space-characters
o pipe that output through wc -w for a count of the names in your path.
example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"
See tr(1) and wc(1) for their functionality.
The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if
the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's
echo() also understands a as the audible bell character; however, these commands do not have an -n option.
OPTIONS -n Do not add the NEWLINE to the output.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases.
SunOS 5.10 3 Aug 1994 echo(1B)