2 # entering multiple variables 3 4 read -p "Enter your name:" first last 5 echo "Checking data for $last, $first" 执行: # ./read1.sh Enter your name: a b Checking data for b, a 2.3-t 参数 指定read 命令等待输入的秒数,当计时满时,read命令返回一个非零退出状态。 #!/bin/bash ...
基本的读取:read命令从标准输入(键盘 )或另一个文件描述符中接受输入。 生成提示的echo命令使用了-n选项 。 该选项不会在字符串末尾输出换行 ,允许脚本用户紧跟其后输入数据,而不是下一行。 实际上,read命令包了-p ,允许你直接在read命令行指定提示符 。 超时:-t 选项指定了read命令等待输入的秒数。当计时器...
Thus, thereadcommand can help us to achieve multiple variables assignment. 3.3. Changing the Delimiter Thereadcommand will take the value of theIFSvariable as the delimiter.By default, it’s whitespace. But we know that the output of a command is not always delimited by whitespace. Let’s c...
You can also view list of all functions along with the bindingins where they appear. This is little bit easier to read, when you like to view all the keybindings for a particular function name. When there are multiple keybindings for the name function, it displays only one line item in ...
Node Version Manager - POSIX-compliant bash script to manage multiple active node.js versions Topics nodejs shell bash zsh node install nvm posix lts version-manager node-js posix-compliant nvmrc Resources Readme License MIT license Code of conduct Code of conduct Security policy Security ...
while IFS= read -r _; do ((count++)) done < "$1" printf '%s\n' "$count" } 1. 2. 3. 4. 5. 6. 7. 8. 用法示例: $ lines ~/.bashrc 48 $ lines_loop ~/.bashrc 48 1. 2. 3. 4. 5. 计算目录中的文件或目录 这是通过将glob的输出传递给函数然后计算参数的数量来实现的。
Ansible is a great tool to automate mundane or complex tasks. It also allows code reuse by passing variables to roles or collections. This is important when ...
Used to run multiple commands together.| > Used to send output to a file. >> Used to append output to a file. ; Used to separate multiple commands. < Used to get input from a file. ~ Expands to the home directory. ~/.bashrc Read by every non-login shell. /etc/profile Executed ...
This variable is readonly. The following variables are used by the shell. In some cases, bash assigns a default value to a variable; these cases are noted below. BASH_ENV If this parameter is set when bash is executing a shell script, its value is interpreted as a filename contain- ...
auto-export of variables in initial environment command search finds functions before builtins bash return builtin will exit a file sourced with `.' builtins: cd -/-L/-P, exec -l/-c/-a, echo -e/-E, hash -d/-l/-p/-t. export -n/-f/-p/name=value, pwd -L/-P, read -e/...