i am just starting to learn about shell scripts, and i thought it would be cool if i could make a "paranoia" script that would erase certain directories on my system (but in the background so as to be relatively hidden). right now i am using one of my music folders for a test run (it's a copy; don't want to really lose my tunes!) because it is a very large directory (like 15GB). I was wondering, can i somehow use /dev/null for something like this? if i use
Code:
sudo rm -rf
^^^^^^(don't use unless you're SURE you want to delete the directory in question!!!)
on that directory i think it would probably take a while... i'd want the fastest way possible, so i thought /dev/null might be an option... just a thought. any ideas?
Maybe it's an stupid question but remeber... I'm Junior..
I use command line to run programs, and some of them gives a lot of information when, for example, you open a window or other actions. That's really bad because my terminal gets full of unwanted messages, so I use "bin file & >/dev/null"... (1 Reply)
Hi,
Q1-What does
nroff -ms > /dev/null
Q2- What does mean -A under STAT column :
ps aux |head -20
UTIL PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 516 93,0 0,0 12 12 - A 04 nov 3906:51 wait
Thank you. (4 Replies)
hello all,
In many shell scripts i found '> /dev/null' , i am not able to get this,
will any one please explain why we are using this.
thanks
sudha (2 Replies)
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Hi expert,
May I know what is the difference between below cron tab entry ?
0,12 * * * * /abc/myscript.sh > /dev/null 2>&1
0,12 * * * * /abc/myscript.sh (7 Replies)
How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&"
echo "hello" > /dev/null 2>&1
echo "hello" > /dev/null 2>1 (3 Replies)
I apologize if this question has been answered else where or is too elementary.
I ran across a KSH script (long unimportant story) that does this:
if ; then
CAS_SRC_LOG="/var/log/cas_src.log 2>&1"
else
CAS_SRC_LOG="/dev/null 2>&1"
fithen does this:
/usr/bin/echo "heartbeat:... (5 Replies)
Hello All and a Happy New year to yous guys.
I'm running the below command on my AIX box and it keeps giving me the message that the file doesn't exist. I know the file don't exist, but I don't want to see the error. 2>/dev/null doesn't work.
bash-3.00$ ls -l C* | wc -l 2>/dev/null
ls:... (2 Replies)
Discussion started by: bbbngowc
2 Replies
LEARN ABOUT DEBIAN
ifp
IFP(1) General Commands Manual IFP(1)NAME
ifp - access iRiver iFP audio devices
SYNOPSIS
ifp command [arguments ...]
DESCRIPTION
ifp lets you manage your music on an iRiver iFP music player acting in "Manager Mode". If your player is using "UMS Mode", then you don't
need this program; it will appear as new drive when you plug it in.
This manual page documents the version of ifp included as an example application for the libifp library. The interface is intended to mimic
the ifp binary found in the ifp-line binary package.
ifp can upload or download files or directories, delete or make directories on the device, format the device, or upgrade your firmware.
COMMANDS
ls [directory]
List the files and directories on the device. The root directory is /. Directories are preceded with 'd' and other files with 'f'.
df Display total and free space on the device.
upload localfile remotefile
Copy the file named localfile to the iFP device, and name it remotefile. (This is like cp.)
upload localfile remotedir
Copy the file named localfile to the iFP device, into remotedir. (This is like cp.)
upload localdir remotedir
Copy the entire directory localdir to the device, into remotedir. This copies into a subdirectory, so upload foo / puts files from
the directory foo info /foo on the device. (This is like cp -R.) This uploads the entire directory, not just audio files.
put localfile | localdir
Upload the file or directory to the device, with the same name it has locally. If a directory is given, it is put in /.
download remotefile localfile
download remotefile localdir
download remotedir localdir
Like upload, but copies from the iFP device to your system. Some proprietary file types may not be downloaded.
get remotefile | remotedir
Like put, but copies files or directories from the device to your current working directory.
rm [-r] file
Delete (recursively) a file (or directory) on the device.
rmdir dir
Delete an empty directory on the device.
mkdir dir
Create a directory on the device.
battery
Display battery status of the device.
typestring
Display the model number of the device.
firmversion
Display the firmware revision currently on the device.
format Reformat the device's memory. This will delete all your music.
firmupdate FIRMWARE.HEX
Upload the file FIRMWARE.HEX as new firmware for the device. This will not delete your music, but may have many other detrimental
effects. Don't turn the device off or unplug it while the firmware is updating, and don't attempt to upload new firmware with a low
battery.
AUTHORS
libifp was written by Geoff Oakham, based on ifp by Yamashiro Jun. This manual page was written for Debian by Joe Wreschnig
<piman@debian.org>, but may be used by others.
May 30th, 2004 IFP(1)