范例八:将/etc/打包后直接解开在/tmp底下,而不产生文件! # cd /tmp # tar -cvf - /etc | tar -xvf - #这个动作有点像是cp -r /etc /tmp啦～依旧是有其有用途的! #要注意的地方在於输出档变成-而输入档也变成-,又有一个|存在～ #这分别代表standard output, standard input与管线命令啦! #这部...
For example, the source of an input stream can be a file, a device, a terminal, or even the output stream from another process. 我们将使用cat命令简要探索Unix的输入和输出(I/O)。 Unix进程使用I/O流来读取和写入数据。进程从输入流读取数据,然后将数据写入输出流。 流非常灵活。 例如,输入流的源...
一个文件或目录的时间戳 - (YYMMDDhhmm) file file1 outputs the mime type of the file as text iconv -l #列出已知的编码 iconv -f fromEncoding -t toEncoding inputFile > outputFile creates a new from the given input file by assuming it is encoded in fromEncoding and converting it to to...
you can detach a process from the shell and put it in the “background” with the ampersand (&); this gives you the prompt back. For example, if you have a large file that you need to decompress with gunzip (you’ll see this ...
# to find the file -> slocate myfile Linux lib*.so lib.so updatedb-> locate libntdll.so-> put the output into /etc/ld.so.conf -> ldconfig -v Linux module probe lsmod -> list all the loaded module rmmod ipchains -> remove module ipchains ...
putchar(c[j++]); //print char into standard output } }else{ puts("open file failed."); } return 0; } (2) FileHandler2.c: non-buffer write #include <stdio.h> #include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> ...
只需要调用 sendfile,数据就能从 input_fd 直接传输到 output_fd。 3.6 适用场景 sendfile 主要用于将文件数据直接传输到网络,非常适合需要高效传输大文件的情况,例如文件服务器、流媒体传输、备份系统等。 在传统的数据传输方式中,数据需要经过多个步骤: 首先,数据从硬盘读取到内核空间。 然后,数据从内核空间拷贝到...
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Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.
-e, --elide-empty-filesdonot generate empty output files with'-n'不产生空的输出文件 --filter=COMMAND write to shell COMMAND; file name is$FILE写入到shell命令行 -l, --lines=NUMBER put NUMBER lines/records per output file 设定每个输出文件的行数 ...