BUCKET_EXISTS=true S3_CHECK=$(aws s3 ls "s3://${BUCKET_NAME}" 2>&1) #Some sort of error happened with s3 check if [ $? != 0 ] then NO_BUCKET_CHECK=$(echo $S3_CHECK | grep -c 'NoSuchBucket') if [ $NO_BUCKET_CHECK = 1 ]; then echo "Bucket does not exist" BUCKET...
-k file 若文件存在且设置了"sticky"位的值 -p file 若文件存在且为一已命名管道,则为真 -r file 若文件存在且可读,则为真 -s file 若文件存在且其大小大于零,则为真 -u file 若文件存在且设置了SUID位,则为真 -w file 若文件存在且可写,则为真 -x file 若文件存在且可执行,则为真 -o file ...
# Usage: Create pdf files from input (wrapper script) # Author: Vivek Gite under GPL v2.x+ #——— #Input file _db="/tmp/wordpress/faq.txt" #Output location o="/var/www/prviate/pdf/faq" _writer="~/bin/py/pdfwriter.py" # If file exists if [[ -f "$_db" ]] then # read...
1 shell script, need help to check if file exists 6 Check if file exists [BASH] 317 How to check if a file exists in a shell script 0 Test if a file exists 0 Bash script to test file existence Hot Network Questions In Norway, when number ranges are listed 3 times on a ...
/bin/bash#shell读取文件的每一行内容并输出,方法1catfile_test |whilereadlinedoecho$linedone###,方法2#for line in \`cat file_test\`#do# echo $line#done ### 17.监控磁盘使用率 monitorDiskUsage.sh #!/bin/bash#监控磁盘使用率disks=(\`df|sed...
File Test Operators Here, we will list some helping testing operators for permissions, size, date, file type, or existence in the bash script. Operators Explanation -e To test if a file exists. -f To test if a given file is a regular file. -d To test if the file is a directory. ...
请考虑以下Bash函数。 echo "check if variable with name $1 exists"} assert_var "FOO"我们的期望是,应该检测变量FOO,同时也不存在BAR。为此,我需 浏览0提问于2020-07-01得票数0 回答已采纳 2回答 以未实例化的变量为条件 我是Bash脚本的新手,对C-type语言有更多的经验。我已经编写了一些带有条件的脚本...
If the condition evaluates to false, the script prints "The number is not greater than 100.". The "fi" statement marks the end of the "if" block. 2. Write a Bash script that checks if a file named "test.txt" exists in the current directory, and if it does, prints "File exists"...
The result of bash's regex matching can be used to replace sed for a large number of use-cases.CAVEAT: This is one of the few platform dependent bash features. bash will use whatever regex engine is installed on the user's system. Stick to POSIX regex features if aiming for ...
‘test’: Check file types and compare values man test(获取帮助) test的判断表达式分为4类 string integer expression file testexits with the status determined by EXPRESSION. Placing the EXPRESSION between square brackets ([and]) is the same as testing the EXPRESSION withtest. ...