diff --git a/README.md b/README.md
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--- a/README.md
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-Anolis OS
-=======================================
-# 代码仓库说明
-## 分支说明
->进行代码开发工作时，请注意选择当前版本对应的分支
-* aX分支为对应大版本的主分支,如a8分支对应当前最新版本
-* aX.Y分支为对应小版本的维护分支，如a8.2分支对应8.2版本
-## 开发流程
-1. 首先fork目标分支到自己的namespace
-2. 在自己的fork分支上做出修改
-3. 向对应的仓库中提交merge request，源分支为fork分支
diff --git a/which-2.21.tar.gz b/which-2.21.tar.gz
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Binary files /dev/null and b/which-2.21.tar.gz differ
diff --git a/which.spec b/which.spec
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+Name:           which
+Version:        2.21
+Release:        1%{?dist}
+Summary:        Displays where a particular program in your path is located 
+
+License:        GPLv3
+URL:            https://savannah.gnu.org/projects/which/
+Source0:        https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.gz
+Source1:        which2.sh
+Source2:	which2.csh
+
+BuildRequires:  make gcc readline-devel
+
+%description
+The which command shows the full pathname of a specified program, if
+the specified program is in your PATH.
+
+%prep
+%autosetup
+
+
+%build
+%configure
+%make_build
+
+
+%install
+rm -rf $RPM_BUILD_ROOT
+%make_install
+
+mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/profile.d
+install -p -m 644 %{SOURCE1} %{SOURCE2} $RPM_BUILD_ROOT%{_sysconfdir}/profile.d/
+rm -f $RPM_BUILD_ROOT%{_infodir}/dir
+
+%files
+%license COPYING
+%doc EXAMPLES README AUTHORS NEWS
+%attr(0644,root,root) %{_sysconfdir}/profile.d/which2.*
+%{_bindir}/which
+%{_infodir}/which.info*
+%{_mandir}/man1/which.1*
+
+
+%changelog
+* Thu Mar 10 2022 forrest_ly <flin@linux.alibaba.com> - 2.21-1
+- Init for Anolis OS 23 
diff --git a/which2.csh b/which2.csh
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+++ b/which2.csh
@@ -0,0 +1,3 @@
+# Initialization script for csh
+
+# alias which 'alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
diff --git a/which2.sh b/which2.sh
new file mode 100644
index 0000000000000000000000000000000000000000..6ef7979b1f61a0156d1fd3d9c9fa4965104ee95a
--- /dev/null
+++ b/which2.sh
@@ -0,0 +1,19 @@
+# shellcheck shell=sh
+# Initialization script for bash, sh, mksh and ksh
+
+which_declare="declare -f"
+which_opt="-f"
+which_shell="$(cat /proc/$$/comm)"
+
+if [ "$which_shell" = "ksh" ] || [ "$which_shell" = "mksh" ] || [ "$which_shell" = "zsh" ] ; then
+  which_declare="typeset -f"
+  which_opt=""
+fi
+ 
+which ()
+{
+(alias; eval ${which_declare}) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"
+}
+
+export which_declare
+export ${which_opt} which