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I cannot use yum command and ssh after mount drive.(CentOS)

As the title above, I cannot use yum command after I mount like below. mount /dev/xvdb3 /usr Filesystem Size Used Avail Use% Mounted on /dev/xvda ...
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0answers
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bash script error - command not found

1 #!/bin/bash 2 #test integer2: evaluate the value of an integer 3 4 INT = 5 5 if [[ $INT =~ ^-?[0-9]+$ ]] ; then 6 if [$INT -eq 0 ]; then 7 echo "INT is zero" 8 ...