directory="./BashScripting" # bash check if directory exists if [ -d $directory ]; then echo "Directory exists" else echo "Directory does not exists" fi 1. 2. 3. 4. 5. 6. 7. 8. 9. 9.2. Nested if/else #!/bin/bash
Check if the directory still exists The -d operator allows you to test if a file is a directory. For example, to check if the /etc/filetocheck directory exists, you can use: NOTE: You can also use double brackets [[ instead of [ single brackets. Check if the file doesn’t exist ...
在Bash Shell中,可以使用复合条件来在一个if语句中检查多个条件。复合条件主要有两种形式:逻辑与(&&)和逻辑或(||)。 1. 逻辑与(&&): - 概念:逻辑与用于同时检查多个条件...
$ checkarg /home/chris/bin/checkarg: line 10: 1: An argument is required $ checkarg x /home/chris/bin/checkarg: line 10: 2: Two arguments are required $ checkarg '' '' /home/chris/bin/checkarg: line 13: 1: A non-empty argument is required $ checkarg x '' /home/chris/bin/...
执行命令区域，否则 不进入循环，介绍while 命令 行3，执行命令区域，这些命令中，Bash，Unix shell的...
function remote_copy { local server=$1 check_previous_run $server test $? -eq 0 && message "$1 ran successfully before. Not doing again" && return 0 local retries=$2 local now=1 status=0 while [ $now -le $retries ]; do message "Trying to copy file from: $server, attempt=$now...
If the directory exists, it prints "Directory exists" and exits with code 0. If the directory does not exist, it prints "Directory not found" and exits with code 1. In the main script, Check if there is exactly one argument provided (the directory name). If not, print the usage infor...
Check a file exists 1 2 3 4 5 6 7 1. 2. 3. 4. 5. 6. 7. #!/bin/bashif [[ -e /tmp/adb.log ]]then echo "Exists"else echo "Not Exists"fi 1. Check Empty String 1 2 3 4 5 6 1. 2. 3. 4. 5. 6. if [[ -z "$emptyString" ]]then echo "Empty"else echo "Not...
mkdir:Make Directory(创建目录) touch:touch man:Manual su:Swith user(切换用户) cd:Change directory ls:List files mkfs:Make file system fsck:File system check uname:Unix name lsmod:List modules mv:Move file cp:Copy file ln:Link files
Check the wireless connection if you do not see one o'clock 🕐 below. " _PREPTERMUXARCH_ _DEPENDSBLOCK_ "$@" _BLOOM_ } _INTROSYSINFO_() { printf "\033]2;%s\007" "bash setupTermuxArch.bash sysinfo 📲" _SETROOT_EXCEPTION_ printf "\\n\\e[0;34m 🕛 > 🕛 \...