read text i=1 for word in $text do echo "Word No-$i = $word" ((i=$i+1)) done Then run the following script: $ bash forloop1.sh Example 2 - for Loop With a Break Statement The break statement is used within the ‘for loop’ to end the loop. First, create a file and ...
line done 使用while循环 while read -r line do echo $line done < filename While循环中read命令从标准输入中读取一行,并将内容保存到变量...line中。...在这里,-r选项保证读入的内容是原始的内容,意味着反斜杠转义的行为不会发生。输入重定向...
test.sh > filename:重定向 test.sh 的输出到文件 filename 中。如果 filename 存在的话,那么将会被覆盖。 test.sh &> filename:重定向 test.sh 的 stdout(标准输出)和 stderr(标准错误)到 filename 中。 test.sh >&2:重定向 test.sh 的 stdout 到 stderr 中。 test.sh >> filename:把 test.sh...
This type of for loop is characterized by counting. The range is specified by a beginning (#1) and ending number (#5). The for loop executes a sequence of commands for each member in a list of items. A representative example in BASH is as follows to display welcome message 5 times wit...
用bash脚本读文件的方法有很多。请看第一部分,我使用了while循环及其后的管道命令(|)(cat $FILE | while read line; do …),并在循环当中递增 i 的值,最后,我得到了非我所想的 i 。主要的原因是,管道命令会发起子shell来读取文件,而任何在(子shell的
while read -r line; do printf '%s\n' "$line" done < "file" 循环遍历文件和目录 不要用ls。 # Greedy example. for file in *; do printf '%s\n' "$file" done # PNG files in dir. for file in ~/Pictures/*.png; do printf '%s\n' "$file" ...
while read -r line; do printf '%s\n' "$line" done < "file" 1. 2. 3. 循环遍历文件和目录 不要用ls。 # Greedy example. for file in *; do printf '%s\n' "$file" done # PNG files in dir. for file in ~/Pictures/*.png; do ...
# for i in *; do echo "Found the following file: $i"; done # for i in `cat filelist.txt`; do echo ${i}; done; if a line may include spaces better use a while loop: # cat filelist.txt | while read LINE; do echo "${LINE}"; done...
The given set of items can be a literal set of objects or anything that Bash can extrapolate to a list. For example, text pulled from a file, the output of another Bash command, or parameters passed via the command line. Converting this loop structure into a Bash script is also trivial...
while read -r line; do printf '%s\n' "$line" done < "file"Loop over files and directoriesDon’t use ls.# Greedy example. for file in *; do printf '%s\n' "$file" done # PNG files in dir. for file in ~/Pictures/*.png; do printf '%s\n' "$file" done # Iterate over ...