http://c.biancheng.net/view/1262.html WebShell 语言中的if条件. 一、if的基本语法: if [ command ]; then 符合该条件执行的语句 elif [ command ]; then 符合该条件执行的语句 else 符合该条件执行的语句 fi. 二、文件/文件夹 (目录)判断. [ -b FILE ] 如果 FILE 存在且是一个块特殊文件则为真。. [ -c FILE ] 如果 FILE 存在 …
Linux 文件判断(if [ -r file ]、if [ -e file ]) 老潘的博客
WebNew generations of precision magnetic encoders offer an attractive and cost-effective alternative to optical encoders. There are numerous markets where magnetic encoders are a good fit, from consumer and industrial markets to the automotive market, which have shown enormous success. This tech talk provides an overview of when and how magnetic … tirr cref
shell if 详解-阿里云开发者社区 - Alibaba Cloud
WebpCBRG-NF-kB. Cat.No.: CBV20001. Description: pNFkB-Luc is designed for monitoring the activation of the nuclear factor of kappa light polypeptide gene enhancer in B-cells (NFkB) signal transduction pathway. NFKB is a transcription regulator that is activated by various intra- and extra-cellular stimuli such as cytokines, oxidant-free radicals ... Web在Linux 系统中linux解压rar文件命令,经常会遇到需要解压RAR文件的情况。 但是,由于RAR格式并不是开源的压缩格式,所以在Linux系统中默认是不支持解压RAR文件的。那 … WebNov 5, 2016 · shell流程控制与其他语言有一点不同就是它的流程控制不可为空,即else分支没有语句执行,就不要写这个else。本文介绍if语法使用方法、特殊文本表达式-z -n -f -eq … tirr finance