很多时候会需要查看Cygwin中已经安装了哪些软件包以及这些软件包的版本信息。Cygwin提供了和各种Linux发行版提供的软件包管理程序(如rpm)类似的实用工具: cygcheck
可以使用cygcheck -h查看该工具的用法:
$ cygcheck -h
Usage: cygcheck [-v] [-h] PROGRAM
cygcheck -c [-d] [PACKAGE]
cygcheck -s [-r] [-v] [-h]
cygcheck -k
cygcheck -f FILE [FILE]...
cygcheck -l [PACKAGE]...
cygcheck -p REGEXP
cygcheck --delete-orphaned-installation-keys
cygcheck --enable-unique-object-names Cygwin-DLL
cygcheck --disable-unique-object-names Cygwin-DLL
cygcheck --show-unique-object-names Cygwin-DLL
cygcheck -h
List system information, check installed packages, or query package database.
At least one command option or a PROGRAM is required, as shown above.
PROGRAM list library (DLL) dependencies of PROGRAM
-c, --check-setup show installed version of PACKAGE and verify integrity
(or for all installed packages if none specified)
-d, --dump-only just list packages, do not verify (with -c)
-s, --sysinfo produce diagnostic system information (implies -c -d)
-r, --registry also scan registry for Cygwin settings (with -s)
-k, --keycheck perform a keyboard check session (must be run from a
plain console only, not from a pty/rxvt/xterm)
-f, --find-package find the package to which FILE belongs
-l, --list-package list contents of PACKAGE (or all packages if none given)
-p, --package-query search for REGEXP in the entire cygwin.com package
repository (requires internet connectivity)
--delete-orphaned-installation-keys
Delete installation keys of old, now unused
installations from the registry. Requires the right
to change the registry.
--enable-unique-object-names Cygwin-DLL
--disable-unique-object-names Cygwin-DLL
--show-unique-object-names Cygwin-DLL
Enable, disable, or show the setting of the
"unique object names" setting in the Cygwin DLL
given as argument to this option. The DLL path must
be given as valid Windows(!) path.
See the users guide for more information.
If you don't know what this means, don't change it.
-v, --verbose produce more verbose output
-h, --help annotate output with explanatory comments when given
with another command, otherwise print this help
-V, --version print the version of cygcheck and exit
Note: -c, -f, and -l only report on packages that are currently installed. To
search all official Cygwin packages use -p instead. The -p REGEXP matches
package names, descriptions, and names of files/paths within all packages.
可以发现使用cygcheck -c -d查看本地已经安装的所有软件包。如果要查找某个软件包是否已经安装及版本信息的话，可以使用cygcheck -c -d | grep regexp,其中regexp是用于匹配软件包名字的正则表达式。例如：
$ cygcheck -c -d | grep lib
libattr1 2.4.43-1
libbz2_1 1.0.5-10
libcairo2 1.8.8-1
libcloog0 0.15.7-1
libdb4.5 4.5.20.2-2
libexpat0 1.95.8-2
libexpat1 2.0.1-1
libexpat1-devel 2.0.1-1
libfontconfig1 2.8.0-1
libfontenc1 1.0.5-1
libfreetype6 2.3.12-1
libgcc1 4.3.4-3
libgcrypt11 1.4.5-1
libgdbm4 1.8.3-20
libgif4 4.1.6-10
libGL1 7.6.1-1
libglitz1 0.5.6-10
libgmp3 4.3.1-3
libgmpxx4 4.3.1-3
libgpg-error0 1.7-1
libgs8 8.63-2
libICE6 1.0.6-1
libiconv2 1.13.1-1
libintl3 0.14.5-1
libintl8 0.17-11
libjasper1 1.900.1-1
libjbig2 2.0-11
libjpeg62 6b-21
libjpeg7 7-10
liblzma1 4.999.9beta-11
libmpc1 0.8-1
libmpfr1 2.4.1-4
libncurses10 5.7-18
libncurses7 5.3-4
libncurses8 5.5-10
libncurses9 5.7-16
libpcre0 8.00-1
libpixman1_0 0.18.0-1
libpng12 1.2.35-10
libpopt0 1.6.4-4
libppl 0.10.2-1
libreadline7 6.0.3-2
libsigsegv2 2.8-1
libSM6 1.1.1-1
libssp0 4.3.4-3
libstdc++6 4.3.4-3
libtiff5 3.9.2-1
libX11_6 1.3.3-1
libXau6 1.0.5-1
libXaw3d7 1.5D-8
libXaw7 1.0.7-1
libxcb-render-util0 0.3.6-1
libxcb-render0 1.5-1
libxcb1 1.5-1
libXdmcp6 1.0.3-1
libXext6 1.1.1-1
libXft2 2.1.14-1
libxkbfile1 1.0.6-1
libXm2 0.95.2-2
libXmu6 1.0.5-1
libXmuu1 1.0.5-1
libXpm4 3.5.8-1
libXrender1 0.9.5-1
libXt6 1.0.8-1
zlib 1.2.3-10
zlib-devel 1.2.3-10
zlib0 1.2.3-10
如果要查询整个cygwin.com网站上软件包仓库的软件包，可以使用cygcheck -p regexp(需要使用网络连接)。例如:
$ cygcheck -p gcc
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