Useful Unix Commands..

1. Trim space and replace it with add new line?

cat file |  tr -s ' ' '\n' ..redirect output into a file

2. Opening remote file through Vim

 vim scp://root@74.125.45.100//root/harendra_file.txt

3. Printer command to print

 lpr -Pprintername file 

 lp -dprintername file

4. Write a command to kill the last background job?

 kill $!

5. Write a command to print success/failure of last executed command?

 echo $?

6. To mount disk

 mount /dev/sda5 /data/

 mount /dev/sda1 /mnt/winxp/

7. Putting an entry in crontab

crontab -e

* * * * * /sbin/ifconfig eth0 arp

* * * * * /sbin/ifconfig eth1 arp

8. adding welcome message when ssh 

 /etc/motd

9. To set date on system

date monthdayhourminutyear

date 010100302000

 or

============================

date - Would list the date and time of the server. Below is an example of the output.

Thu Feb 8 16:47:32 MST 2001

date -s "11/20/2003 12:48:00" - Set the date to the date and time shown.

date '+DATE: %m/%d/%y%nTIME:%H:%M:%S' - Would list the time and date in the below format:

    DATE: 02/08/01

    TIME:16:44:55

=============================

10. extracting/list/zip a file file1 from tgz File.tgz

 tar -xz file1 -f File.tgz

 tar -tzvf File.tgz

 tar -czvf File.tgz

 tar -xzvf File.tgz

11. Allowing all incoming packets

iptables -I INPUT -j ACCEPT

12. Printing.. required librabies for an executable 

ldd ./sipp_tls

13. Printing disk uses

du -chS

14. alsamixer volume controller for linux

alsamixer //volume controller

15. Adding route manually

route add -net 172.16.26.0/24 gw 192.168.0.101

16. pearl command to replace a string in a file

perl -pi -e 's/svk//' `find . -name Root`

perl -pi -e 's/svk@bilbo:2/harendra@172.16.45.102:9/' `find . -name Root`

17. write a message for users connected with different terminals.

wall and ctrl-d

18.  command to kill a process by a signal. 

pkill -USR1 -x tgist

19. tethereal command 

tethereal -i any -R "sip||h225||h245||q931" -S -w file.cap -b file:5 -a filesize:500

20. To print interface details using snmp walk.

snmpbulkwalk -r 1 -Oe -Ot -v 2c -c public localhost ifTable

21. Running valgrind command for memcheck.

valgrind --tool=memcheck --leak-check=full --leak-resolution=high --show-reachable=yes --num-callers=20 --log-file-exactly=/var/log/valg.log --error-limit=no -v ./tgist
22. On fedora Linux starting a service at startup time, list the services
    #chkconfig --add servicename
    #chkconfig --level 2345 servicename [on|off|]
   #chkconfig --list
23. Redirecting output, error to a file on fedora linux
   command &> filename
  command > filename 2 > &1

Firm In Trouble? Give charge to woman.

It's been long time, I created this account I really don't know why?? Probably I was thinking to write something at that point of time I could not make it. This is simply because writing a blog is not a child's play... Look at the guts of mine I at least tried it today. Even I have copied it from some where but it's alright.

Women are being 'setup to fail' because when they get top jobs, it is with a firm in trouble, research says. Companies with falling share prices and collapsing profits are desperate to hire a woman as boss rather a man. This is because women are generally firefighters and good in crisis. The researchers also admit that women are offered top jobs generally with falling companies. This is because such companies struggle to find a man to accept the post. Because females find it difficult to land very senior jobs they generally accept less attractive positions. The chartered Institute of personnel and development, which interviewed the women in power and dubbed the problem 'the glass cliff'. They say that even if women break the glass ceiling the leadership position they land at firm in crisis are relatively risky and precarious. By accepting such positions they are more likely to face possible career suicide by falling off the cliff if they fail to rescue the firm.