请帮忙解释下这个pkg-plist

angelwait

想改下openssh的pkg-plist

@comment slogin must be deleted first
bin/slogin
bin/scp
bin/sftp
bin/ssh
bin/ssh-add
bin/ssh-agent
bin/ssh-keygen
bin/ssh-keyscan
%%NOTBASE%%etc/ssh/moduli
%%NOTBASE%%@exec if [ -f %D/etc/ssh_config -a ! -f %D/etc/ssh/ssh_config ]; then ln %D/etc/ssh_config %D/etc/ssh/ssh_config ; fi
%%NOTBASE%%@exec if [ -f %D/etc/sshd_config -a ! -f %D/etc/ssh/sshd_config ]; then ln %D/etc/sshd_config %D/etc/ssh/sshd_config ; fi
%%NOTBASE%%@unexec if cmp -s %D/etc/ssh/ssh_config %D/etc/ssh/ssh_config-dist; then rm -f %D/etc/ssh/ssh_config; fi
%%NOTBASE%%@unexec if cmp -s %D/etc/ssh/sshd_config %D/etc/ssh/sshd_config-dist; then rm -f %D/etc/ssh/sshd_config; fi
%%BASE%%@cwd /
etc/ssh/ssh_config-dist
etc/ssh/sshd_config-dist
%%BASE%%@cwd %%BASEPREFIX%%
%%NOTBASE%%@exec if [ ! -f %D/etc/ssh/ssh_config ]; then cp -p %D/etc/ssh/ssh_config-dist %D/etc/ssh/ssh_config ; fi
%%NOTBASE%%@exec if [ ! -f %D/etc/ssh/sshd_config ]; then cp -p %D/etc/ssh/sshd_config-dist %D/etc/ssh/sshd_config ; fi
%%NOTBASE%%%%X509%%@dirrmtry etc/ssh/ca
%%NOTBASE%%@dirrmtry etc/ssh
sbin/sshd
share/Ssh.bin
libexec/sftp-server
libexec/ssh-keysign
@exec if [ ! -d %%EMPTYDIR%% ]; then mkdir -p %%EMPTYDIR%% ; fi
%%ERASEEMPTY%%@dirrm empty
@exec if ! pw groupshow sshd 2>/dev/null; then pw groupadd sshd -g 22; fi
@exec if ! pw usershow sshd 2>/dev/null; then pw useradd sshd -g sshd -u 22 -h - -d %%EMPTYDIR%% -s /nonexistent -c "sshd privilege separation"; fi

其中

1. %%NOTBASE%%@unexec if cmp -s %D/etc/ssh/ssh_config %D/etc/ssh/ssh_config-dist; then rm -f %D/etc/ssh/ssh_config; fi

复制代码

这些行里，变量替换  %%NOTBASE%%
和命令@unexec if cmp -s %D/etc/ssh/ssh_config %D/etc/ssh/ssh_config-dist; then rm -f %D/etc/ssh/ssh_config; fi

写在一起是什么意思？