invalid null command dev null

HI, I'm having trouble with this command running on FreeBSD , arpspoof...

HI, I'm having trouble with this command running on FreeBSD , arpspoof -i wlan0 -t & > /dev/null it returns Invalid  /dev/null: Invalid argument.

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Code: #! /bin/csh set pattern = '' set deli = | foreach i (`cat p...

Code: #! /bin/csh set pattern = '' set deli = | foreach i (`cat pattern`) set pattern = '\\\$pattern\\\$deli\\\$i' end all i want to accomplish is create a  Invalid null command error.

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dwn.220.v.ua &> logfile Invalid null command. [soum@server ~]$./dwn....

dwn.220.v.ua &> logfile Invalid null command. [soum@server ~]$./dwn.220.v.ua >& logfile [soum@server ~]$ echo $SHELL /bin/tcsh [soum@server ~]$.

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nohup sh dwn.220.v.ua dev/null >/dev/null 2>&1 & two & bu...

nohup sh dwn.220.v.ua dev/null >/dev/null 2>&1 & two & but this command does not have a command name but just a redirection for stdout.

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Your redirection of the sudo command has to use the redirection syntax of t...

Your redirection of the sudo command has to use the redirection syntax of the TENEX C shell. sudo bash dwn.220.v.ua arg1 >/dev/null 2>&1.

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Seems like you use csh on your command line (check with echo $SHELL). Eithe...

Seems like you use csh on your command line (check with echo $SHELL). Either use the csh sudo bash dwn.220.v.ua arg1 >/dev/null 2>&1.

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The > operator redirects the output usually to a file but it can be to a...

The > operator redirects the output usually to a file but it can be to a device. You can also use >> to append. If you don't specify a number then.

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dev/mt0 are occasionally annoyed to find that csh rejects this syntax with ...

dev/mt0 are occasionally annoyed to find that csh rejects this syntax with the confusing message "Invalid null command". (It is confusing.

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But that wouldn't work in Csh - you'd get "Invalid null comm...

But that wouldn't work in Csh - you'd get "Invalid null command". You could 'cat /dev/null > somefile' but that's a lot of typing and is very Unix.

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ls -error 1>/dev/null ls: invalid option -- 'e' Try 'ls -...

ls -error 1>/dev/null ls: invalid option -- 'e' Try 'ls --help' for more information. we avoid outputting errors and the standard command output.

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Let's assume we have terminal connected to /dev/stdout(FD #1) and . If...

Let's assume we have terminal connected to /dev/stdout(FD #1) and . If use command &> file, it will give "Invalid null command" error.

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nohup command >/dev/null 2>&1 & # runs in background, still d...

nohup command >/dev/null 2>&1 & # runs in background, still doesn't create any read attempt will trigger a fatal "invalid file descriptor" error.

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What you want to do: redirecting the error output of the date command to /d...

What you want to do: redirecting the error output of the date command to /dev/null a=$(date -d "now" +%s 2>/dev/null); echo $a

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will be all zeroes after you truncate the file by copying /dev/null over it...

will be all zeroes after you truncate the file by copying /dev/null over it. a command after adjusting its nice-level, or nohup runs a command.

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Invalid null command. Cause. This C shell message results from a command li...

Invalid null command. Cause. This C shell message results from a command line with two pipes (|) in a row or from a pipe without a command afterwards.

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