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Create new repo in Cobbler for CentOS 5.3 updates

Add a repo to cobbler. To download all the repository contents the command is: cobbler reposync
This is sample output - yours may be different.
-1

cobbler repo add --name=CentOS-5.3-i386-updates --mirror=http://mirror3.mirror.garr.it/mirrors/CentOS/5.3/updates/i386/

w00binda · 2009-04-27 10:18:45 5
Laminate files line by line

Lam is a command available on Bsd (I've tested it on OpenBSD).Is useful for laminate a file line by line. The -f option set the field width ( -f min.max ). Show Sample Output
This is sample output - yours may be different.
```
setg
 
# ht
#
html
 
# ma
#
manp
 
# sa
# Th
#
samp
 
# re
#
read
```
0

lam -f 1.4 myfile

servermanaged · 2009-04-26 19:31:22 12
download a specific file

download a specific file with -f to not display errors and -O to write output to a file named as the remote file. Show Sample Output
This is sample output - yours may be different.
```
% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
 11 1621M   11  192M    0     0  1003k      0  0:27:34  0:03:16  0:24:18 1119k
```
-7

curl -f -O http://pcbsd.fastbull.org/7.0.2/i386/PCBSD7.0.2-x86-DVD.iso

battavia · 2009-04-26 07:23:31 13
Connect to all running screen instances

There was another line that was dependent on having un-named screen sessions. This just wouldn't do. This one works no matter what the name is. A possible improvement would be removing the perl dependence, but that doesn't effect me.
This is sample output - yours may be different.
2

for i in `screen -ls | perl -ne'if(/^\s+\d+\.([^\s]+)/){print $1, " "}'`; do gnome-terminal -e "screen -x $i"; done

hank · 2009-04-25 22:39:24 7
Convert Raw pictures to jpg
This is sample output - yours may be different.
0

for img in $( ls *.CR2 ); do convert $img $img.jpg; done

bass000 · 2009-04-25 19:11:52 7
Get a summary of network devices in the system

Basically an improvement on an earlier ethtool command line. Show Sample Output
This is sample output - yours may be different.
```
# eth0
	Speed: Unknown! (65535)
	Link detected: no
# eth1
	Speed: 100Mb/s
	Link detected: yes
# lo
	Link detected: yes
# pan0
	Link detected: yes
# tap1
	Speed: 10Mb/s
	Link detected: no
```
0

for i in /sys/class/net/*; do e=`basename $i`; echo "# $e"; sudo ethtool $e | grep -E "Link|Speed" ; done

hank · 2009-04-25 14:32:08 10
Watch Network Service Activity in Real-time
This is sample output - yours may be different.
101

lsof -i

hank · 2009-04-25 14:24:04 24
Create directory named after current date

Not a discovery but a useful one nontheless. In the above example date format is 'yyyymmdd'. For other possible formats see 'man date'. This command can be also very convenient when aliased to some meaningful name: alias mkdd='mkdir $(date +%Y%m%d)'
This is sample output - yours may be different.
11

mkdir $(date +%Y%m%d)

thebodzio · 2009-04-25 14:16:45 13
Propagate a directory to another and create symlink to content

Lndir create from source directory to destination directory a full symlink tree of all contents of source directory, really useful for propagate changes from a directory to another.
This is sample output - yours may be different.
4

lndir sourcedir destdir

servermanaged · 2009-04-24 18:30:29 8
Display lines with a given string

Look search for lines in a file that beginning with a given string. Same as $ grep ^n /etc/passwd Show Sample Output
This is sample output - yours may be different.
```
# look mysql /etc/group
mysql:x:125:
```
-2

look mysql /etc/group

servermanaged · 2009-04-24 18:20:20 6
Use md5 to generate a pretty hard to crack password

You can also use sha1sum and variants for longer passwords Show Sample Output
This is sample output - yours may be different.
```
280e25ade5d92394063ca7ae071d9f16
```
-5

echo "A great password" | md5sum

ubersoldat · 2009-04-24 14:32:56 8
set open firmware password command mode to require password to make changes
This is sample output - yours may be different.
-1

/usr/local/bin/OFPW -mode 1

tncook · 2009-04-24 13:09:17 4
Sets OpenFirmware pasword on a mac
This is sample output - yours may be different.
-1

/usr/local/bin/OFPW -pass thepassword

tncook · 2009-04-24 13:08:31 5
Show all detected mountable Drives/Partitions/BlockDevices

Yields entries in the form of "/dev/hda1" etc. Use this if you are on a new system and don't know how the storage hardware (ide, sata, scsi, usb - with ever changing descriptors) is connected and which partitions are available. Far better than using "fdisk -l" on guessed device descriptors. Show Sample Output
This is sample output - yours may be different.
```
disk:
 /dev/sda    USB-Stick
 /dev/cloop0 Disk
 /dev/hda    HARDDISK
partition:
 /dev/sda1   Partition 
 /dev/hda1   Partition
 /dev/hda2   Partition
cdrom:
 /dev/hdc    CD-ROM
floppy:
 /dev/fd0    Floppy Disk
```
13

hwinfo --block --short

Schneckentreiber · 2009-04-24 11:13:31 10
Change password in list of xml files with for and sed
This is sample output - yours may be different.
-6

for i in `ls *xml`; do sed -e 's,oldpassword,newpassword,g' $i > $i.2 && mv -f $i.2 $i ; done

irraz · 2009-04-24 08:53:40 9
Given process ID print its environment variables
This is sample output - yours may be different.
16

sed 's/\o0/\n/g' /proc/INSERT_PID_HERE/environ

unixmonkey3402 · 2009-04-23 22:58:57 8
Install a library to a remote repository
This is sample output - yours may be different.
0

mvn deploy:deploy-file -DgroupId=groupId -DartifactId=artifactId -Dversion=1.0 -Dpackaging=jar -Dfile=pathtolib -DrepositoryId=repository -Durl=url

agasea · 2009-04-23 18:13:08 4
compare two Microsoft Word documents

http://meld.sourceforge.net/ http://www.winfield.demon.nl/
This is sample output - yours may be different.
2

meld <(antiword microsoft_word_a.doc) <(antiword microsoft_word_b.doc)

peter_shook · 2009-04-23 15:14:32 8
Recursively change permissions on files, leave directories alone.
This is sample output - yours may be different.
34

find ./ -type f -exec chmod 644 {} \;

ethanmiller · 2009-04-22 21:14:36 22
compile openvm-tools

compile and install openvm-tools module in debian lenny
This is sample output - yours may be different.
-4

m-a a-i open-vm

m03hr3 · 2009-04-22 20:08:00 5
Browse shared folder when you're the only Linux user

Under Ubuntu smbclient is part of the samba package. With the version I use (3.0.28a) cd-ing into folders with spaces in the name is a drag. You have to put the folder name in quotes: smb: \Shared\> cd "Marketing and PR"
This is sample output - yours may be different.
3

smbclient -U userbob //10.1.1.75/Shared

ethanmiller · 2009-04-22 19:58:51 11
eth-tool summary of eth# devices

Give the Speed and Link status of eth# 0-3. This is sort of what mii-tool does, but eth-tool is better, yet lacks device discovery. Show Sample Output
This is sample output - yours may be different.
```
eth0
        Speed: Unknown! (65535)
        Link detected: no
eth1
        Speed: Unknown! (65535)
        Link detected: no
eth2
        Speed: 1000Mb/s
        Link detected: yes
eth3
        Speed: Unknown! (65535)
        Link detected: no
```
6

for M in 0 1 2 3 ; do echo eth$M ;/sbin/ethtool eth$M | grep -E "Link|Speed" ; done

Wubby · 2009-04-22 19:32:41 9
a short counter

Maybe you know shorter ? Show Sample Output
This is sample output - yours may be different.
```
1
     2
     3
     4
```
18

yes '' | cat -n

flux · 2009-04-22 17:58:46 15
Refresh profile file

If you edit your .profile you need to refresh it for changes to take place. Simple way to refresh is logout and login. This command is the quickest way to do it. If you're deleting some variables, they would not get nulled with this command but just removed.
This is sample output - yours may be different.
-5

. ~/.profile

ruchi · 2009-04-22 16:56:12 16
Get thread count for process on Solaris
This is sample output - yours may be different.
0

ps -L -p <pid> | wc -l

adamm9 · 2009-04-22 15:05:26 5
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Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Copy structure

Clone directory structure without the files

use wget to check if a remote file exists

put your link [url] to check if exist the remote file

Copy history from one terminal to another

Or just do history -w before opening another terminal.

Quick screenshot

Requires ImageMagick. Takes a screenshot 5 seconds after it's run and saves it as desktop_screenshot.jpg Particularly handy when made into a menu option or button.

Get your public ip

Generate a random password 30 characters long

The pwgen program generates passwords which are designed to be easily memorized by humans, while being as secure as possible. Human-memorable passwords are never going to be as secure as completely completely random passwords. [from pwgen man page]

Find the package that installed a command

List of macros defined by gcc

Lists all macros and their values defined by gcc.

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