1. ""
# echo PATH
/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin
2. ''
# echo 'PATH'
PATH
3. ``
# echo `PATH`
-bash: /usr/lib64/qt-3.3/bin:/usr/kerberos/sbin
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1. ""
# echo PATH
/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin
2. ''
# echo 'PATH'
PATH
3. ``
# echo `PATH`
-bash: /usr/lib64/qt-3.3/bin:/usr/kerberos/sbin