# 位置参数调用, 假设在终端输入 bash bash_tutorial.sh 1 2 3 echo "current script name: \$0 $0" # 当前脚本名称 echo "incoming parameters: \$1 $1 \$2 $2 \$3 $3" # 访问传入的参数 echo "the number of parameters: \$# $#" # 传入的参数数量 echo "all parameters: \$@ $@" # ...
Hello, there My name is XYZ My current location is XYZ My home directory is XYZ My default shell is XYZ 提示:使用全局变量$USER、$PWD、$HOME和$SHELL。 练习2:编写一个 bash 脚本,声明一个名为price的变量.使用它来获取以下格式的输出: Today's price is $X Tomorrow's price is $Y 其中X 是...
scriptname >>filename 把scriptname的输出(同>)追加到文件filenmae中,如果文件不存在则创建。 [i]<>filename 打开filename这个文件用来读或者写,并且给文件指定i为它的文件描述符(file descriptor),文件不存在就会创建。 34. (command)>,<(command) 进程替换 这是进程替换(Process Substitution)。 使用的时候注...
[dmtsai@study~]$ type[-tpa]name 选项与参数::不加任何选项与参数时,type 会显示出 name 是外部指令还是 bash 内建指令-t:当加入-t 参数时,type 会将 name 以底下这些字眼显示出他的意义:file:表示为外部指令;alias:表示该指令为命令别名所设定的名称;builtin:表示该指令为 bash 内建的指令功能;-p:如...
# Bash script to display the current user's username echo "Current user's username: $(whoami)" In the script above, echo "Current user's username: $(whoami)": This line prints a message indicating the current user's username. The $(whoami) command is used to retrieve the current user...
/bin/bash#get the month, day, and year of the current dateTIME_OF_BACKUP=`date +%m-%d-%y`#create a backup file using the current date in its nameDESTINATION=/path/[BACKUP FOLDER]-$TIME_OF_BACKUP.tar.gz#the folder that contains the files that we want to backupTARGET_FOLDER=/path/[...
常见的一种误区,是使用 pwd 命令,该命令的作用是“print name of current/working directory”,这才是此命令的真实含义,当前的工作目录,这里没有任何意思说明,这个目录就是脚本存 Java学习123 2018/05/16 11.8K0 oceanbase源码分析 build.sh --init 执行过程 源码阅读腾讯技术创作特训营S11#重启人生 OceanBase是...
Expands to the name of the shell or shell script. This is set at shell initialization. If bash is invoked with a file of commands, $0 is set to the name of that file. If bash is started with the -c option, then $0 is set to the first argument after the string to be executed, ...
If you run the ‘ls –l script.sh’ command again, you may notice that the executable permissions have been added, and the color of the file name has changed since it is now an executable file. Script execution Finally, you can run the ‘./script.sh’ command or ‘bash script.sh’ ...
current_dir=${PWD##*/}echo"$current_dir" Above is the easiest way to do the task. But our next example is a bit complex. We will find the folder name by using the example below. Current_Dir=${PWD##*/}Current_Dir=${Current_Dir:-/}printf'%s\n'"${PWD##*/}"printf'%q\n'"...