1. for i in $(ls *.mp3) Bash 写循环代码的时候,确实比较容易犯下面的错误: for i in $(ls *.mp3); do # 错误! some command $i # 错误! done for i in $(ls) # 错误! for i in `ls` # 错误! for i in $(find . -type f) # 错误! for i in `find . -type f` # 错误!
1. for i in $(ls *.mp3) Bash 写循环代码的时候,确实比较容易犯下面的错误: foriin$(ls *.mp3);do# 错误! somecommand$i# 错误! done foriin$(ls)# 错误! foriin`ls`# 错误! foriin$(find . -typef)# 错误! foriin`find . -typef`# 错误! files=($(find . -typef))# 错误! fo...
/bin/bash for i in `seq 10` do echo "$i" # 如果i == 3,跳出循环 [[ $i -eq 3 ]] && echo "i=3,break" && break done echo "循环结束,i的值是$i" for i in `seq 5` do # 如果 i == 2,不打印 [[ $i -eq 2 ]] && echo "i=2, do not print" && continue echo "$i...
for i in {1..3}; do if useradd user$i &> /dev/null ; then echo "user$i" | passwd --stdin user$i echo "Success to add user$i" else echo "Fail to add user$i" fi done 练习1:于/tmp/test目录中创建10个空文件f1,.., f10; #!/bin/bash for i in {1..10} ;do touch f$...
for i in {1..10}; do mkdir "dir$i" done echo "目录已创建" ``` 10. 批量删除指定文件类型的文件: ```bash #!/bin/bash file_type=".txt" for file in /path/to/directory/*"$file_type"; do if [ -f "$file" ]; then rm "$file" fi done echo "文件已删除" ``` 以上是一些使...
接昨日,Bash脚本写法之二:for i in {1..5};do grep ^http Url.lst | shuf | tail -n 1 | xargs -I % sh -c " echo $% ; brave-browser $%";done【配图:从1到9】 http://t.cn/AiNdLmij
Example #1: Repeat N Times or Iterate over a Range inforLoop inbash To repeat N times, where N is a variable, use either of the following formats. N=10 for i in $(seq 1 $N); do echo "$i-th run" done N=10 for (( i=0; i <= $N ; i++ )); do ...
在bash中,使用循环for i in {0..3},每次循环时,i的值分别是多少()。A.0 1 2 3B.1 2 3C.0 2D.0 1 2
for i in {1..10}; do if [ $((i%2)) -eq 0 ]; then echo "$i even" fi done It’s possible to express this entire loop into a single line. Just like before, replace all the newline with semicolons (;). $ for i in {1..10}; do if [ $((i%2)) -eq 0 ]; then ...
在bash中,使用循环for i in {0..3},每次循环时,i的值分别是多少()。A.0 1 2 3B.1 2 3C.0 2D.0 1 2的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是学习的