只想在CentOS 6上通过yum install
用中文释义：
为什么现在还在使用CentOS 6？
这里有各种各样的安全问题，当然也没有得到支持，这就是要送给你，不得不维护这个早就应该更新的CentOS 6。
是的，在我周围也有CentOS 6。如果是CentOS 6.10还好。但是有些人使用的是CentOS 6.2，甚至还有一些环境根本没有人去维护，或者被禁止维护。更准确地说，甚至有CentOS 4。虽然我自己没用过。
所以，当我们在维护基础设施时，就像Windows XP仍在运行一样，会有人提出想要安装rsync命令的要求。
如果稍有了解，你肯定会说可以使用vault.centos.org，但事实并不只是如此，所以才有了这篇文章的存在。
谁的错啊，不要闹 de cuò a, bō suǒ)
首先试试看
# yum install rsync
Loaded plugins: fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/repo/arch combination/
removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base
嗯，这个仓库已经不存在了。
修改CentOS-Base.repo。
修改/etc/yum.repos.d/CentOS-Base.repo文件，将其指向vault.centos.org的过去存储库。
[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
我会把这个做成这样。
[base]
name=CentOS-6.10 - Base
baseurl=http://vault.centos.org/6.10/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
当然需要对所有相关部分进行同样的修改。虽然这只是一个初版草稿，但随意修改吧。
所以，我试一试（标记）。
因为更换了存储库，根据情况可能会导致 yum 缓存引发故障，所以需要清除它。
# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates zabbix zabbix-non-supported
Cleaning up Everything
Cleaning up list of fastest mirrors
然后，渐渐地…
# yum install rsync
Loaded plugins: fastestmirror
Determining fastest mirrors
http://vault.centos.org/6.10/os/x86_64/repodata/repomd.xml: [Errno 14] problem making ssl connection
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
嗯~，不行呢。（我就知道）
正如“problem making ssl connection”所述，SSL过旧无法进行通信。
SSL相关的更新
嗯，只能通过curl或wget获取文件，但这些工具的SSL版本过旧，无法起作用。因此，我会在另一个环境中获取并进行传输。
# wget https://vault.centos.org/6.10/os/x86_64/Packages/wget-1.12-10.el6.x86_64.rpm
我知道版本很旧，但是在这个环境下不会再有新的软件包出现了，所以就这样吧。请拿给我。
# rpm -Uvh wget-1.12-10.el6.x86_64.rpm
安装。这样就能够连接到最新的https网站了。但为了保险起见，可以加上–no-check-certificate之类的选项。
接下来，我们将更新与SSL相关的一些软件包。
# wget --no-check-certificate https://vault.centos.org/6.10/updates/x86_64/Packages/ca-certificates-2020.2.41-65.1.el6_10.noarch.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/p11-kit-0.18.5-2.el6_5.2.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/p11-kit-trust-0.18.5-2.el6_5.2.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-3.36.0-8.el6.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-util-3.36.0-1.el6.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-softokn-3.14.3-23.3.el6_8.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nspr-4.19.0-1.el6.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-softokn-freebl-3.14.3-23.3.el6_8.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-sysinit-3.36.0-8.el6.x86_64.rpm
# wget --no-check-certificate https://vault.centos.org/6.10/os/x86_64/Packages/nss-tools-3.36.0-8.el6.x86_64.rpm
# rpm -Uvh ca-certificates-2020.2.41-65.1.el6_10.noarch.rpm p11-kit-0.18.5-2.el6_5.2.x86_64.rpm p11-kit-trust-0.18.5-2.el6_5.2.x86_64.rpm nss-3.36.0-8.el6.x86_64.rpm nss-util-3.36.0-1.el6.x86_64.rpm nss-softokn-3.14.3-23.3.el6_8.x86_64.rpm nspr-4.19.0-1.el6.x86_64.rpm nss-softokn-freebl-3.14.3-23.3.el6_8.x86_64.rpm nss-sysinit-3.36.0-8.el6.x86_64.rpm nss-tools-3.36.0-8.el6.x86_64.rpm
準備中... ########################################### [100%]
1:nspr ########################################### [ 10%]
2:nss-util ########################################### [ 20%]
3:nss-softokn-freebl ########################################### [ 30%]
4:p11-kit ########################################### [ 40%]
5:nss-softokn ########################################### [ 50%]
6:nss-sysinit ########################################### [ 60%]
7:nss ########################################### [ 70%]
8:p11-kit-trust ########################################### [ 80%]
9:ca-certificates ########################################### [ 90%]
10:nss-tools ########################################### [100%]
咚。对于在最后一步遇到错误的人，我们向您表示慰问。请尝试不断努力和改进。
# yum install rsync
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
base | 3.7 kB 00:00
base/primary_db | 4.7 MB 00:00
extras | 3.4 kB 00:00
extras/primary_db | 29 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 12 MB 00:01
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package rsync.x86_64 0:3.0.6-12.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================
Package Arch Version Repository Size
=======================================================================
Installing:
rsync x86_64 3.0.6-12.el6 base 335 k
Transaction Summary
=======================================================================
Install 1 Package(s)
Total download size: 335 k
Installed size: 682 k
Is this ok [y/N]: y
Downloading Packages:
rsync-3.0.6-12.el6.x86_64.rpm | 335 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
Installing : rsync-3.0.6-12.el6.x86_64 1/1
Installed:
rsync.x86_64 0:3.0.6-12.el6
Complete!
嗨，你来了。
# rsync
rsync version 3.0.6 protocol version 30
Copyright (C) 1996-2009 by Andrew Tridgell, Wayne Davison, and others.
Web site: http://rsync.samba.org/
Capabilities:
64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints,
socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace,
append, ACLs, xattrs, iconv, symtimes
rsync comes with ABSOLUTELY NO WARRANTY. This is free software, and you
are welcome to redistribute it under certain conditions. See the GNU
General Public Licence for details.
rsync is a file transfer program capable of efficient remote update
via a fast differencing algorithm.
Usage: rsync [OPTION]... SRC [SRC]... DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST
or rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST
or rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST
or rsync [OPTION]... [USER@]HOST:SRC [DEST]
or rsync [OPTION]... [USER@]HOST::SRC [DEST]
or rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]
The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect
to an rsync daemon, and require SRC or DEST to start with a module name.
Options
-v, --verbose increase verbosity
-q, --quiet suppress non-error messages
--no-motd suppress daemon-mode MOTD (see manpage caveat)
-c, --checksum skip based on checksum, not mod-time & size
-a, --archive archive mode; equals -rlptgoD (no -H,-A,-X)
--no-OPTION turn off an implied OPTION (e.g. --no-D)
-r, --recursive recurse into directories
-R, --relative use relative path names
--no-implied-dirs don't send implied dirs with --relative
-b, --backup make backups (see --suffix & --backup-dir)
--backup-dir=DIR make backups into hierarchy based in DIR
--suffix=SUFFIX set backup suffix (default ~ w/o --backup-dir)
-u, --update skip files that are newer on the receiver
--inplace update destination files in-place (SEE MAN PAGE)
--append append data onto shorter files
--append-verify like --append, but with old data in file checksum
-d, --dirs transfer directories without recursing
-l, --links copy symlinks as symlinks
-L, --copy-links transform symlink into referent file/dir
--copy-unsafe-links only "unsafe" symlinks are transformed
--safe-links ignore symlinks that point outside the source tree
-k, --copy-dirlinks transform symlink to a dir into referent dir
-K, --keep-dirlinks treat symlinked dir on receiver as dir
-H, --hard-links preserve hard links
-p, --perms preserve permissions
-E, --executability preserve the file's executability
--chmod=CHMOD affect file and/or directory permissions
-A, --acls preserve ACLs (implies --perms)
-X, --xattrs preserve extended attributes
-o, --owner preserve owner (super-user only)
-g, --group preserve group
--devices preserve device files (super-user only)
--copy-devices copy device contents as regular file
--specials preserve special files
-D same as --devices --specials
-t, --times preserve modification times
-O, --omit-dir-times omit directories from --times
--super receiver attempts super-user activities
--fake-super store/recover privileged attrs using xattrs
-S, --sparse handle sparse files efficiently
-n, --dry-run perform a trial run with no changes made
-W, --whole-file copy files whole (without delta-xfer algorithm)
-x, --one-file-system don't cross filesystem boundaries
-B, --block-size=SIZE force a fixed checksum block-size
-e, --rsh=COMMAND specify the remote shell to use
--rsync-path=PROGRAM specify the rsync to run on the remote machine
--existing skip creating new files on receiver
--ignore-existing skip updating files that already exist on receiver
--remove-source-files sender removes synchronized files (non-dirs)
--del an alias for --delete-during
--delete delete extraneous files from destination dirs
--delete-before receiver deletes before transfer, not during
--delete-during receiver deletes during transfer (default)
--delete-delay find deletions during, delete after
--delete-after receiver deletes after transfer, not during
--delete-excluded also delete excluded files from destination dirs
--ignore-errors delete even if there are I/O errors
--force force deletion of directories even if not empty
--max-delete=NUM don't delete more than NUM files
--max-size=SIZE don't transfer any file larger than SIZE
--min-size=SIZE don't transfer any file smaller than SIZE
--partial keep partially transferred files
--partial-dir=DIR put a partially transferred file into DIR
--delay-updates put all updated files into place at transfer's end
-m, --prune-empty-dirs prune empty directory chains from the file-list
--numeric-ids don't map uid/gid values by user/group name
--timeout=SECONDS set I/O timeout in seconds
--contimeout=SECONDS set daemon connection timeout in seconds
-I, --ignore-times don't skip files that match in size and mod-time
--size-only skip files that match in size
--modify-window=NUM compare mod-times with reduced accuracy
-T, --temp-dir=DIR create temporary files in directory DIR
-y, --fuzzy find similar file for basis if no dest file
--compare-dest=DIR also compare destination files relative to DIR
--copy-dest=DIR ... and include copies of unchanged files
--link-dest=DIR hardlink to files in DIR when unchanged
-z, --compress compress file data during the transfer
--compress-level=NUM explicitly set compression level
--skip-compress=LIST skip compressing files with a suffix in LIST
-C, --cvs-exclude auto-ignore files the same way CVS does
-f, --filter=RULE add a file-filtering RULE
-F same as --filter='dir-merge /.rsync-filter'
repeated: --filter='- .rsync-filter'
--exclude=PATTERN exclude files matching PATTERN
--exclude-from=FILE read exclude patterns from FILE
--include=PATTERN don't exclude files matching PATTERN
--include-from=FILE read include patterns from FILE
--files-from=FILE read list of source-file names from FILE
-0, --from0 all *-from/filter files are delimited by 0s
-s, --protect-args no space-splitting; only wildcard special-chars
--address=ADDRESS bind address for outgoing socket to daemon
--port=PORT specify double-colon alternate port number
--sockopts=OPTIONS specify custom TCP options
--blocking-io use blocking I/O for the remote shell
--stats give some file-transfer stats
-8, --8-bit-output leave high-bit chars unescaped in output
-h, --human-readable output numbers in a human-readable format
--progress show progress during transfer
-P same as --partial --progress
-i, --itemize-changes output a change-summary for all updates
--out-format=FORMAT output updates using the specified FORMAT
--log-file=FILE log what we're doing to the specified FILE
--log-file-format=FMT log updates using the specified FMT
--password-file=FILE read daemon-access password from FILE
--list-only list the files instead of copying them
--bwlimit=KBPS limit I/O bandwidth; KBytes per second
--write-batch=FILE write a batched update to FILE
--only-write-batch=FILE like --write-batch but w/o updating destination
--read-batch=FILE read a batched update from FILE
--protocol=NUM force an older protocol version to be used
--iconv=CONVERT_SPEC request charset conversion of filenames
-4, --ipv4 prefer IPv4
-6, --ipv6 prefer IPv6
--version print version number
(-h) --help show this help (-h works with no other options)
Use "rsync --daemon --help" to see the daemon-mode command-line options.
Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.
See http://rsync.samba.org/ for updates, bug reports, and answers
rsync error: syntax or usage error (code 1) at main.c(1407) [client=3.0.6]
完成了这台服务器的数据迁移，可以废弃了。辛苦了！
