Navigate to a directory where your hello_world.sh is located and make the file executable: $ chmod +x hello_world.sh Now you are ready to execute your first bash script: ./hello_world.sh 2. Simple Backup bash shell script #!/bin/bash tar -czf myhome_directory.tar.gz /home/linuxconf...
How can I check if a directory exists in a bash script? Use the if [ -d "dir" ]; then command to check if a directory named "dir" exists. How do I write scripts to run in the current directory? Use ./script.sh to run a script named "script.sh" in the current directory. The...
Write a Bash script that defines functions for basic file operations like creating a file, deleting a file, and checking if a file exists. Pass file names as arguments to these functions. Code: #!/bin/bash # Function to create a directory create_directory() { local dirname="$1" mkdir -...
#文件测试操作-d FILE_NAM # TrueifFILE_NAM is a directory-e FILE_NAM # TrueifFILE_NAM exists-f FILE_NAM # TrueifFILE_NAM existsandis a regular file-r FILE_NAM # TrueifFILE_NAM is readable-s FILE_NAM # TrueifFILE_NAM existsandisnotempty...
-ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] -ge 大于等于,如:if [ "a"−ge"b" ] -lt 小于,如:if [ "a"−lt"b" ] -le 小于等于,如:if [ "a"−le"b" ] < 小于(需要双括号),如:(("a"<"b")) ...
Write a Bash script that checks if a directory named "workarea" exists and creates it if it doesn't. Code: #!/bin/bash# Check if the directory "workarea" existsif[!-d"workarea"];then# If the directory doesn't exist, create itmkdirworkareaecho"Directory 'workarea' created successfully."...
执行命令区域，否则 不进入循环，介绍while 命令 行3，执行命令区域，这些命令中，Bash，Unix shell的...
printf "unable to create directory %s\n" "$dir" >&2 exit 1 } ls *.pc 2>/dev/null || exit 1 ## check .pc file exists or exit file7="${1##*/}" ## trim path from file.7 name pc_script -f "$file7" -flags1 -other_flags ## first run ...
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 salary and expenses are not equal elif [ $salary != $expenses ]; then echo "Salary and expenses are not equal" fiThis script creates two new variables and compares whether they are equal or not.10. FunctionsA bash function is a set of commands that can be reused numerous tim...