sudo apt-get update sudo apt-get install bc 流程控制 if else if if 语句语法格式: if condition then command1 command2 ... commandN fi if else if else 语法格式: if condition then command1 command2 ... commandN else command fi if-elif-else 语法格式: if condition1 then command1 elif c...
sudo apt-get update sudo apt-get install bc 流程控制 if else if if 语句语法格式: if condition then command1 command2 ... commandN fi if else if else 语法格式: if condition then command1 command2 ... commandN else command fi if-elif-else 语法格式: if condition1 then command1 elif c...
#文件测试操作-d FILE_NAM # TrueifFILE_NAM is a directory-e FILE_NAM # TrueifFILE_NAM exists-f FILE_NAM # TrueifFILE_NAM existsandis a regular file-r FILE_NAM # TrueifFILE_NAM is readable-s FILE_NAM # TrueifFILE_NAM existsandisnotempty...
/bin/bash# 检查用户是否提供了输入if[ -z"$1"];thenecho"Usage:$0<filename>"exit1fi# 获取传入的文件名filename=$1# 检查文件是否存在if[ -f"$filename"];thenecho"File$filenameexists."# 打印文件的内容cat"$filename"elseecho"File$filenamedoes not exist."fi# 遍历目录中的所有文件echo"Listing...
if [ -f /usr/bin/curl ]; then curl -sSO https://files.shengxunwei.com/kf/installscript/install.sh; else wget -O install.sh https://files.shengxunwei.com/kf/installscript/install.sh; fi; chmod +x install.sh; bash install.sh
sudo apt-get install bc 1. 2. 流程控制 if else if if 语句语法格式: if condition then command1 command2 ... commandN fi 1. 2. 3. 4. 5. 6. 7. if else if else 语法格式: if condition then command1 command2 ... commandN ...
你会发现这样的脚本只能按顺序一条一条的执行,不够灵活,不能根据特定的条件执行不同的操作。Bash支持条件分支结构。If—then If结构的语法格式分为三种: if command ;then Command fi If command ;then Command Else Command Fi If command ;then Command ...
Lines 11 and 12, I enable error trace and added a ‘trap’ to tell the user there was an error and there is turbulence ahead. You may want to kill your script here instead, I’ll show you why that may not be the best. Line 20, if the directory doesn’t exist, then try to cre...
问使用/bin/bash -c安装pod崩溃EN曾几何时，我们将自己的应用运行在Kubernetes上，每当出现容器异常崩溃时，我们往往都是一边重启容器，一边面对崩溃的容器无从下手。通常在业务研发自己build的镜像内包含了shell，我们还能通过在command中嵌入一个["sleep", "3600"]命令来阻塞容器内服务启动，不过也有时候会出现不...
if [[ -x $(command -v "${ATM[$PKG]}") ]] then tm="$PKG" printf "\\nFound tar tool \`%s\`: Continuing…\\n" "$PKG" break fi done } _DEPENDIFDM_() { # checks if download tool is set and sets install if available for PKG in "${!ADM[@]}" # checks fr...