file – Page 13 – Tarik Billa

How can I tell how many objects I’ve stored in an S3 bucket?

October 14, 2022 by Tarik

Using AWS CLI aws s3 ls s3://mybucket/ –recursive | wc -l or aws cloudwatch get-metric-statistics \ –namespace AWS/S3 –metric-name NumberOfObjects \ –dimensions Name=BucketName,Value=BUCKETNAME \ Name=StorageType,Value=AllStorageTypes \ –start-time 2016-11-05T00:00 –end-time 2016-11-05T00:10 \ –period 60 –statistic Average Note: The above cloudwatch command seems to work for some while not for others. Discussed here: https://forums.aws.amazon.com/thread.jspa?threadID=217050 Using AWS Web … Read more

How can I use a batch file to write to a text file?

October 11, 2022 by Tarik

You can use echo, and redirect the output to a text file (see notes below): rem Saved in D:\Temp\WriteText.bat @echo off echo This is a test> test.txt echo 123>> test.txt echo 245.67>> test.txt Output: D:\Temp>WriteText D:\Temp>type test.txt This is a test 123 245.67 D:\Temp> Notes: @echo off turns off printing of each command to the … Read more

Keep CMD open after BAT file executes

October 8, 2022 by Tarik

Put pause at the end of your .BAT file.

How to move/rename a file using an Ansible task on a remote system

October 8, 2022 by Tarik

From version 2.0, in copy module you can use remote_src parameter. If True it will go to the remote/target machine for the src. – name: Copy files from foo to bar copy: remote_src=True src=/path/to/foo dest=/path/to/bar If you want to move file you need to delete old file with file module – name: Remove old files … Read more

How I can delete in VIM all text from current line to end of file?

October 6, 2022 by Tarik

dG will delete from the current line to the end of file dCtrl+End will delete from the cursor to the end of the file But if this file is as large as you say, you may be better off reading the first few lines with head rather than editing and saving the file. head hugefile … Read more

How to compare binary files to check if they are the same?

October 6, 2022 by Tarik

The standard unix diff will show if the files are the same or not: [me@host ~]$ diff 1.bin 2.bin Binary files 1.bin and 2.bin differ If there is no output from the command, it means that the files have no differences.

Rename multiple files based on pattern in Unix

September 29, 2022 by Tarik

There are several ways, but using rename will probably be the easiest. Using one version of rename: rename ‘s/^fgh/jkl/’ fgh* Using another version of rename (same as Judy2K’s answer): rename fgh jkl fgh* You should check your platform’s man page to see which of the above applies.

How to read/write from/to a file using Go

September 26, 2022 by Tarik

Let’s make a Go 1-compatible list of all the ways to read and write files in Go. Because file API has changed recently and most other answers don’t work with Go 1. They also miss bufio which is important IMHO. In the following examples I copy a file by reading from it and writing to … Read more

How to read a file in Groovy into a string?

September 26, 2022 by Tarik

String fileContents = new File(‘/path/to/file’).text If you need to specify the character encoding, use the following instead: String fileContents = new File(‘/path/to/file’).getText(‘UTF-8’)

How can I find encoding of a file via a script on Linux?

September 22, 2022 by Tarik

It sounds like you’re looking for enca. It can guess and even convert between encodings. Just look at the man page. Or, failing that, use file -i (Linux) or file -I (OS X). That will output MIME-type information for the file, which will also include the character-set encoding. I found a man-page for it, too 🙂