웹12K views, 606 likes, 302 loves, 279 comments, 30 shares, Facebook Watch Videos from Yuka Kuroyanagi: Midnight Sage 웹2015년 12월 16일 · And it's not about bash (1), it's up to the program mongodump. In unix and linux, the dash - related to input or output, usually stands for stdin or stdout. oxnz is right on target. To expand upon that a little bit, some commands want a file as an argument typically at the end. In the command you describe, mongodump is hoping to output a file.

Facebook - ADC PRACTICE

웹2008년 9월 17일 · The $$ is the process id of the shell in which your script is running. For more details, see the man page for sh or bash. The man pages can be found be either using a command line "man sh", or by searching the web for "shell manpage". Let me second emk's answer -- don't use $$ by itself as a "unique" anything. 웹2024년 8월 1일 · 336. This is the exit status of the last executed command. For example the command true always returns a status of 0 and false always returns a status of 1: true echo $? # echoes 0 false echo $? # echoes 1. From the manual: (acessible by calling man bash in your shell) ? Expands to the exit status of the most recently executed foreground pipeline. cow mineral with fly control

What

웹2024년 2월 1일 · There is nothing magic about the - character as far as the shell is concerned (except that the shell itself, and some of its built-in commands like cd and echo, use it in conventional ways). Some characters, like \, ', and ", are "magical", having special … 웹2024년 9월 18일 · If you want to use a special character as a literal (non-special) character, you have to tell the Bash shell. This is called quoting, and there are three ways to do it. If you enclose the text in quotation marks (“…”), this prevents Bash from acting on most of the special characters, and they just print. 웹2024년 12월 28일 · But then man 1 bash reads: A -- signals the end of options and disables further option processing. Any arguments after the -- are treated as filenames and … disney founders statue