how to check if a file exists with bash?
479811
In order to check if a file exists in Bash, you have to use the “-f” option (for file) and specify the file that you want to check. For example, let's say that you want to check if the file “/etc/passwd” exists on your filesystem or not.
500706
Most Linux distributions have wget installed by default. To check whether it is installed on your system or not, type wget on your terminal and press enter. If it is not installed, it will display “command not found” error.
832438
The file_exists() function in PHP is an inbuilt function which is used to check whether a file or directory exists or not. The path of the file or directory you want to check is passed as a parameter to the file_exists() function which returns True on success and False on failure.
1123066
Bash Strings Equal To check if two strings are equal in bash scripting, use bash if statement and double equal to == operator. To check if two strings are not equal in bash scripting, use bash if statement and not equal to != operator.
789448
Use the diff command to compare text files. It can compare single files or the contents of directories. When the diff command is run on regular files, and when it compares text files in different directories, the diff command tells which lines must be changed in the files so that they match.
1245591
['Set execute permission on your script: chmod +x script-name-here.sh.', 'To run your script, enter: ./script-name-here.sh. Another option is as follows to execute shell script: sh script-name-here.sh. bash script-name-here.sh.']
1246570
PHP | file_exists( ) Function. The file_exists() function in PHP is an inbuilt function which is used to check whether a file or directory exists or not. The path of the file or directory you want to check is passed as a parameter to the file_exists() function which returns True on success and False on failure.
668632
5 Answers. You could call mkdir() . If the directory does not exist then it will be created and 0 will be returned. If the directory exists then -1 will be returned and errno will be set to EEXIST .
59274
Python: Check If a File Exists. To check if, in Python, a file exists use the os module to call one of three methods: isfile() , isdir() , and exists() . isfile() checks if a file exists, isdir() checks if a directory exists, and exists() checks for both.
587804
You were probably looking for the command /sbin/ifconfig . If this file does not exist (try ls /sbin/ifconfig ), the command may just be not installed. It is part of the package net-tools , which is not installed by default, because it's deprecated and superseded by the command ip from the package iproute2 .
500136
inline bool exist(const std::string& name) { ifstream file(name); if(! file) // If the file was not found, then file is 0, i.e. ! file=1 or true. return false; // The file was not found.
1120531
['-d: f the path is a directory, return 0.', '-e: if the path exists, return 0.', '-f: if the path is a file, return 0.', '-s: if the path is not empty, return 0.', '-z: if the file is zero length, return 0.']
925234
To check if a file exists in Python use the os module to call one of three methods: isfile() , isdir() , and exists() . isfile() checks if a file exists, isdir() checks if a directory exists, and exists() checks for both. Checking whether or not a certain file or directory exists has a number of uses in Python.
924782
Using the Dir Command to Check If a File Exists Then we use the Dir function to get the file name into the variable strFileExists. If the file exists in the directory, its name will be assigned to the variable strFileExists.
747489
Approach 1: Use ajax() method of jQuery to check if a file exists on a given URL or not. The ajax() method is used to trigger the asynchronous HTTP request. If the file exists, ajax() method will in turn call ajaxSuccess() method else it will call Error function.
182392
To check if, in Python, a file exists use the os module to call one of three methods: isfile() , isdir() , and exists() . isfile() checks if a file exists, isdir() checks if a directory exists, and exists() checks for both.
955249
The exists() method of the File object returns a boolean value based on the existence of the file in which it was invoked. If the file exists, the method returns true. It returns false if the file does not exist.