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Increase mplayer maximum volume
use '0' and '9' to increase/decrease volume. this is useful on laptops with low speaker volume.

Restart command if it dies.
works well in crontab.

last.fm rss parser
you can just use one awk script to parse the rss feed. No need to pipe so many awk's and sed's. Its ugly and inefficient.

Disconnect a wireless client on an atheros-based access point
This command will disconnect the user whose mac was specified from the current list of clients from the wireless network when the network card is working in access point mode. Works on atheros-based access points which use the madwifi driver (not sure, but don't think it will work on access points which are not atheros-based, as it uses the atheros's iwpriv extensions). It will not prevent the user from reconnecting to the network, but may force the user to roam to another AP, with stronger signal.

Check whether laptop is running on battery or cable
1 = on ac, 0 = on bat

Get your external IP address ( 10 characters long )
Shortest url to a external IP-service, 10 characters.

Synchronise a file from a remote server
You will be prompted for a password unless you have your public keys set-up.

connects to db2 database instance/alias "stgndv2" user "pmserver" using password "xxxxxxx"
db2 => ? connect CONNECT [USER username [{USING password [NEW new-password CONFIRM confirm-password] | CHANGE PASSWORD}]] CONNECT RESET CONNECT TO database-alias [IN {SHARE MODE | EXCLUSIVE MODE [ON SINGLE DBPARTITIONNUM]}] [USER username [{USING password [NEW new-password CONFIRM confirm-password] | CHANGE PASSWORD}]]

Compute the average number of KB per file for each dir
Shorter version using --tag

Convert tab separate file (TSV) to JSON with jq
With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output.


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