However, newer file systems (ext4,zfs,btrfs,JFS, andXFS) store the creation time stamp in separate fields: ext4–crtime zfs–crtime XFS–crtime btrfs–otime JFS -di_otime The above fields store data in the fileinode. There are 3 different ways to get file creation date/time in Bash. ...
You can also set the system clock using the date command, but it’s usually a bad idea to do so because you’ll never get the time exactly right. Your system clock should be as close to the correct time as possible. Unix机器依赖准确的时间记录。内核维护着系统时钟,当你运行像date这样的命...
Back to the original script. Rewrite it (version 3) to useatinstead of justdatefor scheduling the data file download: #!/bin/bash# Simple script that shows how to work with dates and times, and Unix 'at'# Jose Vicente Nunez Zuleta#test-x/usr/bin/date||exit100test-x/usr/bin/at||...
When you use quotes, you’re often trying to create a literal, a string that you want the shell to pass to the command line untouched. In addition to the $ in the example that you just saw, other similar circumstances include when you want to pass a * character to a command such as...
In many cases, it may be useful to find out where a function has been defined so you can either fix or update it. Though, either in the interactive or non-interactive mode, you can’t easily trace a specific function. In bash, you will need to enable the extdebug shell option with ...
This chapter is a guide to the Unix commands and utilities that will be referenced throughout this book. This is preliminary material, and you may ...
o To install the software anywhere you like. You can even install several different versions of the same package. o To control the version that you install. Distributions don’t always stay up-to-date with the latest versions of all packages, particularly add-ons to software packages (such ...
Display username, hostname and path to current directory: export PS1="\u@\h\w " You will see a tilde (~) symbol if the current directory is $HOME. Display date in BASH prompt: To display date with your username and hostname in the BASH prompt, add the following entry in ~/.bashrc...
$ man date Run the following command to access the help message. $ date --help Print Current Date And Time Launch your terminal and simply run thedatecommand. You will get the current date along with the time and timezone. In my case, I have set the timezone asISTduring my OS install...
Using Date in Scripts Enabling a Bash shell script to print the time and date is trivial. Create a text file with the following content, and save it asgd.sh. #!/bin/bash TODAY=$(date +"Today is %A, %d of %B") TIMENOW=$(date +"The local time is %r") ...