[: missing `]' +bash +shell scripts

 "=" sign requires a blank in front of it and after it. Otherwise, the bash only sees "something" within the brackets, and that is true (0), while "nothing" is false (1):

ex.

[ 5 = 6]

solution 

[ 5 = 6 ] 

Tutorials:

http://wiki.linuxquestions.org/wiki/Bash_tips

http://www.tldp.org/LDP/abs/html/

https://wiki.archlinux.org/index.php/Color_Bash_Prompt 

Solution: rpmbuild: command not found

yum  install  rpm-build

Solution: merge two files / append two files in Linux

Code:

cat file1 file2 .. fileN  > mergedfile

Note the '>' in the command: it points that the target file follows, don't forget to put it there.

Advance:
 
If you accept that entries in the resulting file are sorted, you can use uniq to remove duplicates.

Code:

cat file1 file2 | sort | uniq > mergedfile

Solution : raise TypeError("bufsize must be an integer")

Error : subprocess.call(['vim'],['/home/patelm/.bashrc'])

Solution: subprocess.call(['vim','/home/patelm/.bashrc'])

Whenever you're running subprocess.call and you see this
error, say to yourself: "Have I passed the command line
as one parameter in a list; or have I passed it as a series
of parameters?"

diff rcs file

Code:

rcsdiff -r1.1 -r1.2 -u file

here we are diffing rev 1.2 agains 1.1


If you want to colour the output you can use the idiff script

Code:

rcsdiff -r1.1 -r1.2 -u file | ./idiff

How to view content of RPM package

use following switch

--filesbypkg
    List all the files in each selected package.

rpm -q -filesbypkg -p filename.rpm

Word 2007: Password Protect Your Document File

1. Click the Microsoft Office Button, and then click Save As.
2. Click Tools, and then click General Options.
3. You can type a password in Password to open or Password to modify.
4. Click OK.
5. When prompted, retype your passwords to confirm them, and click OK.
6. Click Save.

ref:- http://www.technipages.com/word-2007-password-protect-your-document-file.html

Solved : Finding computer name using IP

Windows:

nbtstat -a ipaddress

Linux:

nmblookup -A  ipaddress

Solution :called too early to check prototype at in Perl

one of the way shis can happen if

you have declared function as

sub fun()
{

}

In perl you should declare function as

sub fun
{

}

- mihir patel

Solution : where is lsof + lsof command not found

lsof is usually found under

/usr/sbin/

So you can run it as

/usr/sbin/lsof