Running for loop from bash shell command line: $ for f in $( ls /var/ ); do echo $f; done 1. 2. 3. 4. 5. 6. 7. 8. 12.2. Bash while loop #!/bin/bashCOUNT=6 # bash while loop while [ $COUNT -gt 0 ]; do echo Value of count is: $COUNT let COUNT=COUNT-1 done 1...
for arg in elem1 elem2 ... elemN do # statements doneDuring each pass through the loop, arg takes on the value from elem1 to elemN. Values may also be wildcards or brace expansions.Also, we can write for loop in one line, but in this case there needs to be a semicolon before...
The following example uses a for loop to print all the days of the week:#!/bin/bashfor days in Monday Tuesday Wednesday Thursday Friday Saturday Sundaydoecho “Day: $days”doneOn line 2, “days” automatically becomes a variable, with the values being the day names that follow. Then, ...
var = 42# Spaces around = in assignments$foo=42# $ in assignmentsfor$varin*;do...# $ in for loop variablesvar$n="Hello"# Wrong indirect assignmentecho${var$n}# Wrong indirect referencevar=(1, 2, 3)# Comma separated arraysarray=( [index] = value )# Incorrect index initializationech...
for i in {0..100}; do printf '%s\n' "$i" done 1. 2. 3. 4. 循环遍历可变数字范围 替代seq。 # Loop from 0-VAR. VAR=50 for ((i=0;i<=VAR;i++)); do printf '%s\n' "$i" done 1. 2. 3. 4. 5. 循环数组 arr=(apples oranges tomatoes) ...
(2) creates a potentially very long single line of output” 如何把用换行符“\n”分隔的一个大字符串,分割开,并存放到一个数组中? #!/bin/bash declare OUTPUT=$(sshroot@10.111.111.111isi_for_array isi_flush --dedupe-queue --dedupe-index ) ...
for i in {0..100}; do printf '%s\n' "$i" done 循环遍历可变数字范围 替代seq。 # Loop from 0-VAR. VAR=50 for ((i=0;i<=VAR;i++)); do printf '%s\n' "$i" done 循环数组 arr=(apples oranges tomatoes) # Just elements. ...
You need to run three commands, but they are independent of each other and don’t need to wait for the previous ones to complete. Solution You can run a command in the background by putting an ampersand (&) at the end of the command line.Thus, you could fire off all three commands...
#Single-lineif[[ 1-eq1 ]];thenecho"true";fi#Multi-lineif[[ 1-eq1 ]];thenecho"true"fi#Single-lineif[[ 2-ne1 ]];thenecho"true";elseecho"false";fi#Multi-lineif[[ 2-ne1 ]];thenecho"true"elseecho"false"fi Releases No releases published ...
line 新行符 \r carriage return 回车\t horizontal tab 水平跳格 \v vertical tab 竖直跳格 \\ backslash 反斜杠 \’ single quote 单引号 \nnn 一个八比特字符,它的值是八进制值 nnn (一到三个数字)。 \xHH 一个八比特字符,它的值是十六进制值 HH (一到两个十六进制数 字)。 \cx 一个 ctrl-x...