#以下演示cp命令的用法
[root@CentOS ~]# cd /usr/local/nginx/conf
nginx.conf
#如需顯示執行過程，可以使用以下選項
#當使用cp命令復制單個文件時，第1個參數表示源文件，第2個參數表示目標文件
[root@CentOS conf]# cp -v  nginx.conf nginx.conf.20200412
`nginx.conf' -> `nginx.conf.20200412'
[root@CentOS conf]# ls -l nginx.conf nginx.conf.20200412
-rw-r--r--. 1 root root 2685 Apr 11 03:15 nginx.conf
-rw-r--r--. 1 root root 2685 Apr 12 20:33 nginx.conf.20200412
#復制多個文件
[root@CentOS conf]# cp -v nginx.conf nginx.conf.20200412  backup/
`nginx.conf' -> `backup/nginx.conf'
`nginx.conf.20200412' -> `backup/nginx.conf.20200412'
[root@CentOS conf]# ll nginx.conf nginx.conf.20200412  backup/
-rw-r--r--. 1 goss goss 2685 Apr 12 20:47 nginx.conf
-rw-r--r--. 1 root root 2685 Apr 12 20:59 nginx.conf.20200412
backup/:
total 8
-rw-r--r--. 1 root root 2685 Apr 12 21:01 nginx.conf
-rw-r--r--. 1 root root 2685 Apr 12 21:01 nginx.conf.20200412
#復制文件夾
[root@CentOS nginx]# cp conf conf.bak
cp: omitting directory `conf'
[root@CentOS nginx]# cp -r conf conf.20200412
[root@CentOS nginx]# ls –l
total 40
drwxr-xr-x. 2 root   root 4096 Apr 12 20:33 conf
drwxr-xr-x. 2 root   root 4096 Apr 12 20:33 conf.20200412
[root@CentOS goss]# su – goss
#復制時保留文件的原始屬性
[goss@CentOS ~]$ cp  -a  /usr/local/nginx/ .
cp: cannot access '/usr/local/nginx/uwsgi_temp': Permission denied
cp: cannot access '/usr/local/nginx/fastcgi_temp': Permission denied
cp: cannot access '/usr/local/nginx/scgi_temp': Permission denied
cp: cannot access '/usr/local/nginx/client_body_temp': Permission denied
cp: cannot access '/usr/local/nginx/proxy_temp': Permission denied
[goss@CentOS ~]$ ls –l
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx
[goss@CentOS ~]$ ll
total 2784
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx
[root@CentOS goss]# cp -a nginx/ nginx.bak
[root@CentOS goss]# ls -l
total 2788
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx.bak
[root@CentOS goss]# cp -r nginx nginx.root
[root@CentOS goss]# ls -l
total 2792
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx
drwxr-xr-x. 12 goss goss    4096 Apr 12 20:33 nginx.bak
drwxr-xr-x. 12 root root    4096 Apr 12 20:35 nginx.root
[root@CentOS conf]# cp -i /usr/local/nginx/conf/nginx.conf .
cp: overwrite './nginx.conf'? n
[root@CentOS conf]# cp -f  /usr/local/nginx/conf/nginx.conf .
[root@CentOS conf]#
#并不復制文件本身，而是創建當前文件的軟鏈接
[root@CentOS conf]# cp -s nginx.conf nginx.conf_s
[root@CentOS conf]# ls -l
lrwxrwxrwx. 1 root root   10 Apr 12 20:49 nginx.conf_s -> nginx.conf
[root@CentOS conf]# md5sum nginx.conf /usr/local/nginx/conf/ng
nginx.conf          nginx.conf.bak      nginx.conf.default  nginx.conf.mv
[root@CentOS conf]# md5sum nginx.conf /usr/local/nginx/conf/nginx.conf
1181c1834012245d785120e3505ed169  nginx.conf
30d53ba50698ba789d093eec830d0253  /usr/local/nginx/conf/nginx.conf
[root@CentOS conf]# cp -b /usr/local/nginx/conf/nginx.conf .
cp: overwrite './nginx.conf'? y
[root@CentOS conf]# md5sum nginx.conf*
30d53ba50698ba789d093eec830d0253  nginx.conf
1181c1834012245d785120e3505ed169  nginx.conf~