Commands by sungam (2)

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Use a var with more text only if it exists
See "Parameter Expansion" in the bash manpage. They refer to this as "Use Alternate Value", but we're including the var in the at alternative.

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)

Debug a remote php application (behind firewall) using ssh tunnel for XDEBUG port 9000
If you need to xdebug a remote php application, which is behind a firewall, and you have an ssh daemon running on that machine. you can redirect port 9000 on that machine over to your local machine from which you run your xdebug client (I am using phpStorm) So, run this command on your local machine and start your local xdebug client, to start debugging. more info: http://code.google.com/p/spectator/wiki/Installing

Sync the date of one server to that of another.
(Useful when firewalls prevent you from using NTP.)

Rename files in batch

Batch convert files to utf-8
taken from http://blog.ofirpicazo.com/linux/batch-convert-files-to-utf-8/

print contents of file from first match of regex to end of file
Search in "filename" for the first line to match regex, and print to stdout from the matching line to the end of the file.

Check a server is up. If it isn't mail me.
Joker wants an email if the Brand X server is down. Set a cron job for every 5 mins with this line and he gets an email when/if a ping takes longer than 3 seconds.

list files recursively by size

send a file or directory via ssh compressing with lzma for low trafic


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