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Display current time in requested time zones.
The time zone names come from the tz database which is usually found at /usr/share/zoneinfo.

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Append a pub key from pem file and save in remote server accessing with another key
Useful if you need to add another key and you using pem files (typical in AWS EC2 Instances). If you use it in EC2 instances, remember that password authentication is disabled, so you have to use the first key generated when you generated the instance

Do a search-and-replace in a file after making a backup

Use color grep by default
Alias the grep command to show colored results by default.

copy partition table from /dev/sda to /dev/sdb

Check SSH public and private keys matching
Tested in bash4

rsync with progress bar.
transfer files from localhost to a remotehost.

Pipe STDOUT to vim
The hyphen tells vim to open from STDOUT - saves having to create temporary files.

Outputs a sorted list of disk usage to a text file
Recursively searches current directory and outputs sorted list of each directory's disk usage to a text file.


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