Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
if [ $MAX -lt ${ARRAY[$I]} ]; then MAX=${ARRAY[$I]} fi done echo "ARRAY_MAX is$MAX" 5.实验,利用RANDOM随机生成数组,并将数组内的最大值取出来,如下脚本: #!/bin/bash # echo -n "ARRAY is " for I in {0..9}; do ARRAY[$I]=$RANDOM echo -n "${ARRAY[$I]} " done echo...
/bin/bash array=(12 34 5 6 78) array[0]=666 array[2]=888 printf "array[0]=%d\n" ${array[0]} printf "array[1]=%d\n" ${array[1]} printf "array[2]=%d\n" ${array[2]} printf "array[3]=%d\n" ${array[3]} printf "array[4]=%d\n" ${array[4]} #打印数组全部元素的...
linux bash array list #定义array ptpArray=() while read line do #将文件读取内容放到array中,注意作为字符串放,否则空格会被分隔成行 ptpArray+=("$line") done < a #echo "${#ptpArray[@]}" #for line in "${ptpArray[@]}"
id命令显示的是当前用户的uid、gid等的相关信息。uid是Linux中对用户的唯一标识,这条命中的 uid=1001(user)标识你当前登陆的用户是user1,它的uid是1001; gid=100(users)表示它的首要组是users组,这个组的gid是100;groups=100(users),16(dialout),33(video) 表示它的附属组是dialout,video。
Add new elements to the array Adding a new element to the array is simple. All you have to do is create a new key-value pair like as shown below. $ STAR_PLAYERS[Belgium]="Hazard" $ echo ${STAR_PLAYERS[@]} Add new element to the array ...
${arr[*]} # All of the items in the array ${!arr[*]} # All of the indexes in the array ${#arr[*]} # Number of items in the array ${#arr[0]} # Length of item zero The ${!arr[*]} is a relatively new addition to bash, it was not part of the original array impleme...
Bash cat script | gzip -9 | base64 -w 0 自定义脚本扩展使用以下算法来运行脚本: 断言脚本值的长度不得超过 256 KB。 Base64 对脚本的值进行解码。 尝试对 Base64 解码的值执行 gunzip 操作。 将解码和(可选)解压缩的值写入磁盘:/var/lib/waagent/custom-script/#/script.sh。
Bash 复制 cat script | gzip -9 | base64 -w 0 自定义脚本扩展使用以下算法来运行脚本: 断言脚本值的长度不得超过 256 KB。 Base64 对脚本的值进行解码。 尝试对 Base64 解码的值执行 gunzip 操作。 将解码和(可选)解压缩的值写入磁盘:/var/lib/waagent/custom-script/#/script.sh。 使用_/bin/...