Bash string comparison It is advisable always to check and compare if two strings are equal in a Bash script; this is quite important for different reasons. If two strings are equal in a Bash script, it implies that both strings have the same length and character sequence. The “if” stat...
Check empty bash array with string comparison We are going to use two elements to check if bash array is empty or not. One is${#array[@]}and other is the-zoperator. Here, the${#array[@]}is used in Bash for array expansion, allowing you to access all elements of an array.Don't ...
If the given string is found the exit status code 0 (zero) will be returned and the if block will be executed. On the other hand, if the given string is not found non-zero exit status will be returned and the else block will be executed. On execution of the above code, we can ...
Thesedcommand is a text-processing utility that can transform text in various ways. In this case, we’re using thesedcommand to identify uppercase letters within a string: $ if echo "${var}" | sed '/[A-Z]/q'; then echo "The string contains uppercase letters." else echo "The stri...
/bin/bash if[-z"$1"] then echo"Input argument is missing." exit1 fi echo"Input argument exists." Here the “-z” option is used with the “test” command to check if the input argument is an empty string or not. The script will output an error message and exit with a status ...
$ ./test.bash 1 1 You provided two arguments. $ ./test.bash 1 Error: Exactly 2 arguments are required. [[ $# != 2 ]]: Checks if the number of arguments is not equal to 2 using a conditional expression. [[ ... ]]: This is a Bash conditional expression. It’s an advanced ve...
/bin/bash FILEPATH=$1 if [ ! -f "$FILEPATH" ]; then echo "File not found" fi Run Below command to check $ sh filecheck.sh /tmp/users.txt Check if file exists if [ -f /tmp/users.txt ]; then echo "File is exist" fi
# If you specify a value of 2, for example, then the values 1.008 and 1.009 will be rounded to 1.01, and will checksum as equal 8.--function # 计算checksum值时的函数,默认是CRC32,其他还有FNV1A_64, MURMUR_HASH, SHA1, MD5等
Thresholds possible. master Monitor the current master node of the ES cluster. The parameter -e can be used to check for a certain node to be master and alert if this is not the case.Usage / running the plugin on the command lineUsage:...
check_id(string: "")- Specifies the unique ID of the check to use. Query Parameters EnterpriseEnterprise $curl \--request PUT \http://127.0.0.1:8500/v1/agent/check/pass/my-check-id This endpoint is used with a TTL type check to set the status of the check towarningand to reset the...