Registering copy of red hat enterprise linux
rhn_register
To extract tar.gz file in cygwin
gunzip -d httpd-2_0_NN.tar.gz
tar xvf httpd-2_0_NN.tar
Cygwin commands
Cygcheck -s
Whereis boost
Cygpath ==> to get corresponding linux path
Cygpath --windows ==> to get corresponding windows path
SVN
Svn status ------> to find all the modified files
Grep commands
grep -iR "" *.* -------> find the text in all the files with ignore case and recursively in subdir
Linux machine access remotely from windows machine
Commands for SSH via cygwin:
$ xwin –ac –resize &
To get OS configuration
uname -a
Shutdown linux box
Shutdown -h now
Reboot
Current directory
pwd
To start GUI
Startx
Tty?
To copy file remotely (secure copy = scp)
scp root@xxx.xx.xx.xx:/home/xxx/desheu1.tar.gz .
Super user
Su-
Install using super user account
Sudo Yup install xrdp
Sudo Yup install screen
To list running processes and killing one process
Ps -ef | grep "firefox"
To clear the terminal screen
Clear
Installing Java
Yum install java
To find where is the package installed
Type screen
Which screen
Find / screen
listing all the scsi devices on linux box
lsscsi: to list the scsi devices on the local system
>yum install lsscsi
>lsscsi
equivalent on windows is diskpart.exe with LIST DISK command
installing sg_utils
yum install sg_utils
The list of sg utils can be found at
http://sg.danny.cz/sg/sg3_utils.html. You can also download the utilties on windows from this site. Utils i tried and which works on both Windows and Linux are like
sg_scan
Some commands to explore
top : similar to task manager in windows
dd: create large files
man (page 1: bash commands, page 2: system calls, page 3: CLIs etc)
ldd: list dependant modules - static list read from a dll or exe
lsmod: list loaded kernel modules
grep, e(xtended)grep and f(ast)grep : to find substrings from a file using regex
find: to find files with regex
ulimit:
http://justlearningtoblog.wordpress.com/2010/07/23/enable-core-dump-files-in-fedora/
ifconfig to get the ip and mac address
strace
ptree
df -ah : to check the disk free
du -ah: to list disk usage
mount : to list all the mounted fs
Some questions to answer:
Where does the core dump go for deamons vs CLIs?
http://justlearningtoblog.wordpress.com/2010/07/23/enable-core-dump-files-in-fedora/
shared memory/mapped files/pipes on linux
system calls (fopen vs open)
How to check the list of dynamically loaded libraries in a live process? lsof -p
(
http://www.akadia.com/services/lsof_intro.html
http://www.unix.com/programming/34498-how-view-loaded-shared-libraries-running-processes-linux.html)
Some cheet sheet for commands:
http://www.pixelbeat.org/cmdline.html
Basic vi editor commands
y - copy
h j k l - arrow left, down, up, right (respectvely)
yy - copy one line
p - paste
:buffers - to list the buffers copied in clipboard
yw - copy one word
yn - copy n lines
ynw - copy n words
0 - go to the start of the line
y0 - copy from current cursor till start of line
$ - go to end of line
y$ - copy from current cursor to end of line
u - undo
dd - delete one line
dj - delete current and line below current line (remember j is the arrow down command)
guu - lowercase
gUU - uppercase