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1.apt-get update
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2.apt-get check
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3.apt-get dist-upgrade
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4.apt-get install package_name
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5.apt-get remove package_name
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6.apt-get source package_name
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7.apt-get clean
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8.apt-get upgrade package_name
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#Default runlevel.The runlevels used by RHS are:
# 0-halt(Do NOT set initdefault to this)
# 1 -Single user mode
# 2-Multiuser,without NFS(The same as 3,if you do not have networking)
# 3-Full multiuser mode
# 4-unu ......