Commands using at sorted by votes

Commands using at (30)

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shutdown pc in a 4 hours

Benefit is that it doesn't make you keep the terminal open.
This is sample output - yours may be different.
-2

echo "shutdown -h now" | sudo at now + 4 hours

depesz · 2011-05-02 15:29:48 4
Place a filename at the beginning of the line to make it easier to edit the search at the end of the command. Place a filename at the beginning of the line to make it easier to edit the search at the end of the command.

Show Sample Output
This is sample output - yours may be different.
```
$ </var/log/messages grep foo

$ </var/log/messages grep bar

$ </var/log/messages grep user1
```
-4

Place a filename at the beginning of the line to make it easier to edit the search at the end of the command.

iveney · 2009-02-07 12:03:19 13
Run a command at a certain time
This is sample output - yours may be different.
-5

echo ?ls -l? | at 10am Jul 21

techie · 2013-04-29 10:11:01 9
Run a command at a certain time #2
This is sample output - yours may be different.
-5

echo ?ls -l? | at midnight

techie · 2013-04-29 10:11:35 8
Search Google from the command line and return the first result.

Yep, now you can finally google from the command line! Here's a readable version "for your pleasure"(c): google() { # search the web using google from the commandline # syntax: google google query=$(echo "$*" | sed "s:%:%25:g;s:&:%26:g;s:+:%2b:g;s:;:%3b:g;s: :+:g") data=$(wget -qO - "https://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=$query") title=$(echo "$data" | tr '}' '\n' | sed "s/.*,\"titleNoFormatting//;s/\":\"//;s/\",.*//;s/\\u0026/'/g;s/\\\//g;s/#39\;//g;s/'amp;/\&/g" | head -1) url="$(echo "$data" | tr '}' '\n' | sed 's/.*"url":"//;s/".*//' | head -1)" echo "${title}: ${url} | http://www.google.com/search?q=${query}" } Enjoy :) Show Sample Output
This is sample output - yours may be different.
```
hunterm:~ >>> google bash
bash.org: http://www.bash.org/ | http://www.google.com/search?q=bash
```
-7

The command is too big to fit here. :( Look at the description for the command, in readable form! :)

hunterm · 2011-01-05 02:45:28 8
< 1 2

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Put the machine to sleep after the download(wget) is done

[Note: This command needs to be run as root]. If you are downloading something large at night, you can start wget as a normal user and issue the above command as root. When the download is done, the computer will automatically go to sleep. If at any time you feel the computer should not go to sleep automatically(like if you find the download still continuing in the morning), just create an empty file called nosleep in /tmp directory.

Batch Convert SVG to PNG (in parallel)

Convert some SVG files into PNG using ImageMagick's convert command. Run the conversions in parallel to save time. This is safer than robinro's forkbomb approach :-) xargs runs four processes at a time -P4

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Escape forward slashes in a variable

For example $ path="/etc/apt/sources.list"; echo ${path//'/'/'\/'} will print $ \/etc\/apt\/sources.list

Create date based backups

This script creates date based backups of the files. It copies the files to the same place the original ones are but with an additional extension that is the timestamp of the copy on the following format: YearMonthDay-HourMinuteSecond

Remount an already-mounted filesystem without unmounting it

Necessary for fsck for example. The remount functionality follows the standard way how the mount command works with options from fstab. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified. After this call all old mount options are replaced and arbitrary stuff from fstab is ignored, except the loop= option which is internally generated and maintained by the mount command. It does not change device or mount point.

Easily decode unix-time (funtion)

A shell function using perl to easily convert Unix-time to text. Put in in your ~/.bashrc or equivalent. Tested on Linux / Solaris Bourne, bash and zsh. using perl 5.6 and higher. (Does not require GNU date like some other commands)

watch your network load on specific network interface

-n means refresh frequency you could change eth0 to any interface you want, like wlan0

bash/ksh function: given a file, cd to the directory it lives

fcd : file change directory A bash function that takes a fully qualified file path and cd's into the directory where it lives. Useful on the commadline when you have a file name in a variable and you'd like to cd to the directory to RCS check it in or look at other files associated with it. Will run on any ksh, bash, likely sh, maybe zsh.

Swap a file or dir with quick resotre

This lets you replace a file or directory and quickly revert if something goes wrong. For example, the current version of a website's files are in public_html. Put a new version of the site in public_html~ and execute the command. The names are swapped. If anything goes wrong, execute it again (up arrow or !!).

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