iso checksum 文件使用

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Eg: 验证Fedora-Workstation-Live-x86_64-25-1.3.iso
首先下载.iso文件和checksum文件

wget http://linux-ftp.sh.intel.com/pub/mirrors/fedora/linux/releases/25/Workstation/x86_64/iso/Fedora-Workstation-Live-x86_64-25-1.3.iso

wget http://linux-ftp.sh.intel.com/pub/mirrors/fedora/linux/releases/25/Workstation/x86_64/iso/Fedora-Workstation-25-1.3-x86_64-CHECKSUM

可以不用下载checksum文件，直接 vim Fedora-Workstation-25-1.3-x86_64-CHECKSUM

-----BEGINPGP SIGNED MESSAGE-----

Hash:SHA256

SHA256(Fedora-Workstation-netinst-x86_64-25-1.3.iso) =6a1e69416b0d72efd2962ce01bdad547074a32b70f7d70e2e6436d16398522a7

SHA256(Fedora-Workstation-Live-x86_64-25-1.3.iso) =818017f42a2741cfaf20e94aecf6a63d1b995abfdaff5917df7218d0d89976a7

-----BEGINPGP SIGNATURE-----

iQIcBAEBCAAGBQJYLw0YAAoJEECJ2PL9sZyY+tEQAJ85l6JjWIjA4+0XRoHIBS6L

CCEbTJemadfu4b+wwLDKg0s5KUfYlX6tcbXsLyDRYy3G3xpGQf5htZsUu33Nozkm

Zm+tAAZy8Z+olduBblx1D0s9+EH8MU725IYKY+1aZj/U1KQbLZRubIiItjGPrUr0

3l9n+N5entyFGT9d3L4GCDulHaKlO1SEHKQvjAgY3Rgz9lG1vUK5Nmyydj1rFTit

uhwr9eXvCv8HPfYsxtsm1AoZYhcqtDOd8OvnbvjZXMlpggVJVo74000TrSecwMlE

CtjaL+sGxMbs4im1WskW58kqgl/Rfkw7LdKEJ0ACbf7oRByh8TKqH4W1MSJXprix

lrmTP8JlU4U9BAyxuHnynCCs6QRePBhLpJIXpT3qAotCdfvPuNHeZhf7WW0XJbPD

Ds8av7w0AE3m/mOkJU0aavDfKZR/NHCdRP4rNV0OBERVLRykAFX2yOBAPg6vKFL9

ybR/IqYeZsBO9jBGD6TN4xuZH5O2DI82a2q+k3Ty0oj+bB7MdbjWpE7rURGTKhpg

3LD9DgpKwCiL4L5npLsMTWrUESML8hPyYKHAS948MOf9aN+2r+ATvW5Wa//TTyK6

ITnfugTYmGufZy+sL8eOrWYVyjgn0qQU7JKopHw/e7ZOQeUnOUgUeeFgybYwiWgn

/j/6pMc4+9ouR65AeN+l

=KAZZ

-----END PGPSIGNATURE-----

执行sha256sum命令

root@test:/home# sha256sum -cFedora-Workstation-25-1.3-x86_64-CHECKSUM

sha256sum: Fedora-Workstation-netinst-x86_64-25-1.3.iso: Nosuch file or directory

Fedora-Workstation-netinst-x86_64-25-1.3.iso: FAILED open orread

Fedora-Workstation-Live-x86_64-25-1.3.iso: OK

sha256sum: WARNING: 43 lines are improperly formatted

sha256sum: WARNING: 1 listed file could not be read

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