Meaning of "> /dev/null 2>&1" Post: 302100935

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Meaning of $var->{"@$row[0]"}=" "; ???

while (my $row = $sth->fetchrow_arrayref) { $var->{"@$row"}=" "; } Can anyone help me understanding above mentioned. i) As per my knowledge $row is taking ARRAY Refernce from the database ii) @$row is containing the value of 0th index of the array, testted the same. but I am not able...

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Difference between ">/dev/null 2>&1" and "2>&1 >/dev/null"

Does >/dev/null 2>&1 and 2>&1 >/dev/null mean the same?

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the meaning of "!:" in "alias foo 'command\!:' filename"

Hi: How can I remove my own post? Thanks.

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Meaning of "b" modifier in "sort" command

I need to sort the following file by the rhdiskpower devices in the last column: Total_MB Free_MB OS_MB Name Failgroup Library Label UDID Product Redund Path 1024 851 1024 OCRVOT1_0000 OCRVOT1_0000 System UNKNOWN ...

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/dev/null 2>&1 Versus /dev/null 2>1

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

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Meaning of 2>/dev/null/ <<EOF ?

I am new to unix and learning. Came across this statement cmd 2>/dev/null/ <<EOF 2>/dev/null/ denotes that std error is stored in /dev/null but that is considered as a non-existent file!! What does << EOF mean and how does it affect? I am really confused.. :wall: Can some one explain this...

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find error?? find / -name "something.txt" 2>/dev/null

why is this giving me errors? i type this in: find / -name "something.txt" 2>/dev/null i get the following error messages: find: bad option 2 find: path-list predicate-list :confused:

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What is the meaning of "-s" option in "if" statement?

Hi Guys, I'm sorry but I can't find answer for this, what is the meaning of -s option in "if" statement on unix scipting. Please see sample below: opath=/home/output for i in N1 N2 N3 N4 do echo $i if then grep $i $opath/N5_CRAI > $opath/N5_$i.crai chmod 777 $opath/N5_$i.crai ...

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Redirecting standard out to /dev/null goes to file "/dev/null" instead

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:...

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finding the strings beween 2 characters "/" & "/" in .txt file

Hi all. I have a .txt file that I need to sort it My file is like: 1- 88 chain0 MASTER (FF-TE) FFFF 1962510 /TCK T FD2TQHVTT1 /jtagc/jtag_instreg/updateinstr_reg_1 dff1 (TI,SO) 2- ...

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Meaning of 2>/dev/null/ <<EOF ?

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find error?? find / -name "something.txt" 2>/dev/null

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Redirecting standard out to /dev/null goes to file "/dev/null" instead

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