linu是一套免費使用和自由傳播的類uni操作系統(tǒng)(已改無錯字)
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【正文】 些變化中的東西！ ? /var/spool：存放一些郵件、打印隊列等 Nankai University, CY LI, 3/2/2023 14 Introduction to Unix 簡單命令 ? ls, list files directories in the working directory ? cd, change directory ? cp, copy file ? mv, move file ? mkdir, make directory ? pwd, print working directory ? man, list manual ? editors: vi, emacs, pico Nankai University, CY LI, 3/2/2023 15 Introduction to Unix 顯示文件內(nèi)容 ? Cat: concatenates and prints files ? More: ? Less ? Head ? Tail Nankai University, CY LI, 3/2/2023 16 Introduction to Unix Input output ? Standard input (stdin): keyboard。 Standard output (stdout): monitor。 ? Creating files with cat。 ? Stdin stdout’ s redirecting: , 。 ? Pipe “ |” : it is used to pipe the output of the first mand to the input of the second mand. ? Filters (transforms its output in some way): sort, wc。 such as ls | sort –r. Nankai University, CY LI, 3/2/2023 17 Introduction to Unix File permissions ? There are three different permission modes, reading, writing executing, for three different users: owner, group, all. ? ls –l, showing the permission info, 10 bits。 ? Chmod [who] [permissions] [file]: Nankai Uni
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