【背景】
想要将find出来的一堆文件，用cp去拷贝到目标文件夹。
但是自己试了试find和xarg，结果没搞定。
注：
之前已经折腾了：
【已解决】利用linux管道或重定向将find出来的文件送给rm删除
和：
但是现在还是无法实现所需要的效果。
【折腾过程】
1.后来参考：
去试试：
CLi@PC-CLI-1 /cygdrive/d/to_del/docbook
$ find . -name *.pdf
./arm_vs_mips/release/pdf/arm_vs_mips.pdf
./binutils_intro/release/pdf/binutils_intro.pdf
./build_website/release/pdf/build_website.pdf
./buy_house/release/pdf/buy_house.pdf
./char_encoding/release/pdf/char_encoding.pdf
./compute_basic/release/pdf/compute_basic.pdf
./crifanlib_csharp/release/pdf/crifanlib_csharp.pdf
./crifanlib_python/release/pdf/crifanlib_python.pdf
./crifan_rec_soft/release/pdf/crifan_rec_soft.pdf
./crosstool_ng/release/pdf/crosstool_ng.pdf
./cross_compile/release/pdf/cross_compile.pdf
./csharp_summary/release/pdf/csharp_summary.pdf
./cygwin_intro/release/pdf/cygwin_intro.pdf
./dma_pl08x_analysis/release/pdf/dma_pl08x_analysis.pdf
./docbook_dev_note/release/pdf/docbook_dev_note.pdf
./english_learn/release/pdf/english_learn.pdf
./fieldbus_intro/release/pdf/fieldbus_intro.pdf
./firmware_download/release/pdf/firmware_download.pdf
./hardware_basic/release/pdf/hardware_basic.pdf
./interrupt_related/release/pdf/interrupt_related.pdf
./json_tutorial/release/pdf/json_tutorial.pdf
./language_dev_basic/release/pdf/language_dev_basic.pdf
./language_summary/release/pdf/language_summary.pdf
./linux_nand_driver/release/pdf/linux_nand_driver.pdf
./linux_wireless/release/pdf/linux_wireless.pdf
./mpeg_vbr/release/pdf/mpeg_vbr.pdf
./nand_get_type/release/pdf/nand_get_type.pdf
./programming_language_basic/release/pdf/programming_language_basic.pdf
./python_beginner_tutorial/release/pdf/python_beginner_tutorial.pdf
./python_intermediate_tutorial/release/pdf/python_intermediate_tutorial.pdf
./python_summary/release/pdf/python_summary.pdf
./python_topic_beautifulsoup/release/pdf/python_topic_beautifulsoup.pdf
./python_topic_re/release/pdf/python_topic_re.pdf
./python_topic_str_encoding/release/pdf/python_topic_str_encoding.pdf
./python_topic_web_scrape/release/pdf/python_topic_web_scrape.pdf
./rec_soft_npp/release/pdf/rec_soft_npp.pdf
./regular_expression/release/pdf/regular_expression.pdf
./runtime_upgrade_linux/release/pdf/runtime_upgrade_linux.pdf
./soft_dev_basic/release/pdf/soft_dev_basic.pdf
./symbology_code128/release/pdf/symbology_code128.pdf
./symbology_gs1128/release/pdf/symbology_gs1128.pdf
./symbology_plessey/release/pdf/symbology_plessey.pdf
./symbology_upc/release/pdf/symbology_upc.pdf
./uboot_starts_analysis/release/pdf/uboot_starts_analysis.pdf
./usb_basic/release/pdf/usb_basic.pdf
./usb_disk_driver/release/pdf/usb_disk_driver.pdf
./usb_hid/release/pdf/usb_hid.pdf
./virtualbox_tutorial/release/pdf/virtualbox_tutorial.pdf
./virutal_machine_tutorial/release/pdf/virutal_machine_tutorial.pdf
./vmware_tutorial/release/pdf/vmware_tutorial.pdf
./website_transfer/release/pdf/website_transfer.pdf
./web_scrape_emulate_login/release/pdf/web_scrape_emulate_login.pdf
CLi@PC-CLI-1 /cygdrive/d/to_del/docbook
$ find . -name *.pdf | xargs -i cp {} ../docbook_pdf/
CLi@PC-CLI-1 /cygdrive/d/to_del/docbook
$ ls ../docbook_pdf/
arm_vs_mips.pdf* cross_compile.pdf* hardware_basic.pdf* programming_language_basic.pdf* regular_expression.pdf* usb_disk_driver.pdf*
binutils_intro.pdf* crosstool_ng.pdf* interrupt_related.pdf* python_beginner_tutorial.pdf* runtime_upgrade_linux.pdf* usb_hid.pdf*
build_website.pdf* csharp_summary.pdf* json_tutorial.pdf* python_intermediate_tutorial.pdf* soft_dev_basic.pdf* virtualbox_tutorial.pdf*
buy_house.pdf* cygwin_intro.pdf* language_dev_basic.pdf* python_summary.pdf* symbology_code128.pdf* virutal_machine_tutorial.pdf*
char_encoding.pdf* dma_pl08x_analysis.pdf* language_summary.pdf* python_topic_beautifulsoup.pdf* symbology_gs1128.pdf* vmware_tutorial.pdf*
compute_basic.pdf* docbook_dev_note.pdf* linux_nand_driver.pdf* python_topic_re.pdf* symbology_plessey.pdf* web_scrape_emulate_login.pdf*
crifan_rec_soft.pdf* english_learn.pdf* linux_wireless.pdf* python_topic_str_encoding.pdf* symbology_upc.pdf* website_transfer.pdf*
crifanlib_csharp.pdf* fieldbus_intro.pdf* mpeg_vbr.pdf* python_topic_web_scrape.pdf* uboot_starts_analysis.pdf*
crifanlib_python.pdf* firmware_download.pdf* nand_get_type.pdf* rec_soft_npp.pdf* usb_basic.pdf*达到效果了。
man xargs中，对应的参数的解释：
-I replace-str
Replace occurrences of replace-str in the initial-arguments with names read from standard input. Also, unquoted blanks do not terminate in‐
put items; instead the separator is the newline character. Implies -x and -L 1.
-i [replace-str], --replace[=replace-str]
This option is a synonym for -Ireplace-str if replace-str is specified. If the replace-str argument is missing, the effect is the same as
-I{}. This option is deprecated; use -I instead.
2.但是对于上述的，大括号，即curly bracket的含义，不是很清楚：
【已解决】Linux shell中的空的（左右）大括号的含义
【总结】
| find . -name *.pdf | xargs -i cp {} ../docbook_pdf/ |
的写法的含义解释：
- find . -name *.pdf ：递归式的找出当前文件夹及其子文件下的所有.pdf文件
- xargs -i xxx ：其中xxx==cp {} ../docbook_pdf/，表示将输入的内容，用{}替换
- cp {} ../docbook_pdf/ ：对于每一个find出来的文件，拷贝到对应的目标文件夹中。