linux commands for websphere

here are the commands  needed while working with websphere

ssh username@<hostname/ip address>
telnet <hostname/ip address>
scp username@<hostname/ip address>:<src file path> <trgt path>
ftp <hostname/ip address>

uname -n

uname -a

cat /etc/*-release   ---->  only for linux. not working for AIX,

ping <hostname/ipaddress>

Some time it is necessary to increase or decrease timeouts on TCP sockets. You can use/proc/sys/net/ipv4/tcp_keepalive_time to setup new value.

ulimit   ---- tcp connection limit

Most used commands in WAS

1) Tell me the command to find RAM size in AIX/Unix?

A) prtconf only for AIX.

2) Command to find disk free space?

A) df  -k or m

3) In ls -lrt, what t stands for and r stands for l stands for?

 -l shows you huge amounts of information (permissions, owners, size, and when last modified.)

 -r reverses the order of how the files are displayed.

 -t shows you the files in modification time

4) How to check a particular port is listening or not in UNIX?

A) netstat -a| grep 80

5) How do you perform heap dump and thread dump?

A) kill -3 <pid>

6). How to check disk usage in Linux or UNIX?

A) du -k

7). How to check the multiple NIC in Unix or Linux?

A) ifconfig -a

8). How to identify and kill a process ID?

A) ps -ef

10) To find the no.of running JAVA process

A) ps -ef | grep java| wc -l

11) How to find out that a port is listening on remote Box ?

A) telnet Hostname 80

12) What to see only last 10 lines of a log file ?

A) tail -10 logfilename

Files

ls –l                              lists your files in 'long format', which contains lots of useful information, e.g. the exact size of the file, who owns the file and who has the right to look at it, and when it was last modified.

ls –a                             lists all files, including the ones whose filenames begin in a dot, which you do not always want to see.

ls –altr                          a option is to show the hidden files

more filename              shows the first part of a file, just as much as will fit on one screen. Just hit the space bar to see more or q to quit. You can use /pattern to search for a pattern.

emacs filename            is an editor that lets you create and edit a file.

rm -f file name              to delete files without interation

cp file1 file2                 copies file1 to file2

chmod 777 filename     to give all permissions (read 4, Write 2, execute 1)

chmod 644 filename     to give write permissions

diff filename1 filename2           compares files, and shows where they differ

wc filename                  tells you how many lines, words, and characters there are in a file

File Compression:

Making Archive file:

tar -cvf tarfilename(samlogserver).tar file1 file2            To make tar file of files1,file2....

gzip filename               compresses files, so that they take up much less space. Usually text files compress to about half their original size, but it depends very much on the size of the file and the nature of the contents. There are other tools for this purpose, too (e.g. compress), but gzip usually gives the highest compression rate. Gzip produces files with the ending '.gz' appended to the original filename.

gunzip filename           uncompresses files compressed by gzip.

gzcat filename              lets you look at a gzipped file without actually having to gunzip it (same as gunzip -c). You can even print it directly, using                                             gzcat filename  lpr

gzcat tarfilename tar-xvf

gzip tarfilename ( Compresses the archived tar file)

gunzip gzfilename

jar -tvf jar file name      It shows list of classes in the jar file

zip filename.zip filename         Zipping a file and opening a file in windows

Disk Size:

du -hs file name/directory        To get the size of the file/directory

df –h                                        size of each mount

du -hs SUNWam                       To get the size of SUNWam file/directory

Finding things

ff --- find files anywhere on the system. This can be extremely useful if you've forgotten in which directory you put a file, but do remember the name. In fact, if you use ff -p you don't even need the full name, just the beginning. This can also be useful for finding other things on the system, e.g. documentation. 

grep string filename(s) --- looks for the string in the files. This can be useful a lot of purposes, e.g. finding the right file among many, figuring out which is the right version of something, and even doing serious corpus work. grep comes in several varieties (grep, egrep, and fgrep) and has a lot of very flexible options. Check out the man pages if this sounds good to you

find ./ -name 'direcorty or file name' ----------------- finds the given direcorty or file name.

find . -name *.log -exec grep -il oracle {} ;

find . name *.* -exec grep -il 'Enter new PIN, containing 4 to 8 characters' {};

find . | xargs grep "p-level Policy Admin Role,ou=role,dc=dupont,dc=com,amsdkdn=cn"

find . | xargs grep stg

Miscellanious:

lsof | grep slapd | grep LISTEN            -------- to find portnumber of the various slapd instances

lsof | grep ldaprole | grep LISTEN        -------- to find portnumber of various ldaprole instances

ps -ef | grep slapd                                --------- to find the DS Instances are running or not

export PATH=$PATH:/opt/sfw/bin         --------- to export the bin path

nohup                          Run the command in the background & Run the command even if Putty gets logged out

Roles:

id to get the current ID

sudo su - eisadmin     ---------to get eisadmin permissions

sudo stop/start

sudo -l to get the list of sudo permissions

sudo su - root ------ to get the root permissions

sudo su - ldaprole to get ldaprole permission

About Other People

w          --- Tells you who's logged in, and what they're doing. Especially useful: the 'idle' part. This allows you to see whether they're actually sitting there typing away at their keyboards right at the moment. 

who      --- Tells you who's logged on, and where they're coming from. Useful if you're looking for someone who's actually physically in the same building as you, or in some other particular location.

finger username           --- Gives you lots of information about that user, e.g. when they last read their mail and whether they're logged in. Often people put other practical information, such as phone numbers and addresses, in a file called .plan. This information is also displayed by 'finger'.

last -1 username           --- Tells you when the user last logged on and off and from where. Without any options, last will give you a list of                   everyone's logins.

talk username              --- lets you have a (typed) conversation with another user

write username --- lets you exchange one-line messages with another user

elm                              --- lets you send e-mail messages to people around the world (and, of course, read them). It's not the only mailer you can use, but the one we recommend. See the elm page, and find out about the departmental mailing lists (which you can also find in /user/linguistics/helpfile).

About Your Self

whoami --- returns your username. Sounds useless, but isn't. You may need to find out who it is who forgot to log out somewhere, and make sure *you* have logged out.

finger & .plan files

of course you can finger yourself, too. That can be useful e.g. as a quick check whether you got new mail. Try to create a useful .plan file soon. Look at other people's .plan files for ideas. The file needs to be readable for everyone in order to be visible through 'finger'. Do 'chmod a .plan' if necessary. You should realize that this information is accessible from anywhere in the world, not just to other people on turing.

passwd --- lets you change your password, which you should do regularly (at least once a year). See the LRB guide and/or look at help password.

ps -u yourusername --- lists your processes.

quota -v --- show what your disk quota is (i.e. how much space you have to store files), how much you're actually using, and in case you've exceeded your quota (which you'll be given an automatic warning about by the system) how much time you have left to sort them out (by deleting or gzipping some, or moving them to your own computer).

du filename --- shows the disk usage of the files and directories in filename (without argument the current directory is used). du -s gives only a total.

last yourusername --- lists your last logins. Can be a useful memory aid for when you were where, how long you've been working for, and keeping track of your phonebill if you're making a non-local phonecall for dialling in.

Connecting To The Outside World

nn --- allows you to read news. It will first let you read the news local to turing, and then the remote news. If you want to read only the local or remote news, you can use nnl or nnr, respectively. To learn more about nn type nn, then \tty{:man}, then \tty{=.*}, then \tty{Z}, then hit the space bar to step through the manual. Or look at the man page. Or check out the hypertext nn FAQ - probably the easiest and most fun way to go.

rlogin hostname --- lets you connect to a remote host. 

telnet hostname --- also lets you connect to a remote host. Use rlogin whenever possible. 

ftp hostname --- lets you download files from a remote host which is set up as an ftp-server. This is a common method for exchanging academic papers and drafts. If you need to make a paper of yours available in this way, you can (temporarily) put a copy in /user/ftp/pub/TMP. For more permanent solutions, ask Emma. The most important commands within ftp are get for getting files from the remote machine, and put for putting them there (mget and mput let you specify more than one file at once). Sounds straightforward, but be sure not to confuse the two, especially when your physical location doesn't correspond to the direction of the ftp connection you're making. ftp just overwrites files with the same filename. If you're transferring anything other than ASCII text, use binary mode. 

lynx --- lets you browse the web from an ordinary terminal. Of course you can see only the text, not the pictures. You can type any URL as an argument to the G command. When you're doing this from any Stanford host you can leave out the .stanford.edu part of the URL when connecting to Stanford URLs. Type H at any time to learn more about lynx, and Q to exit

date --- shows the current date and time. 

cal --- shows a calendar of the current month. Use e.g., 'cal 10 1995' to get that for October 95, or 'cal 1995' to get the whole year

VI Editor Commands:

Saving a file:

:w write         current contents to file named in original vi call.

:w newfile      write current contents to a new file named newfile.

:w! prevfile    write current contents over a pre-existing file named prevfile.

Exit vi:

:x      quit vi, writing out modified file to file named in original invocation.

:wq   quit vi, writing out modified file to file named in original invocation.

:q       quit (or exit) vi

:q!      quit vi even though latest changes have not been saved for this vi call

Moving the Cursor:

j   [or down-arrow] move cursor down one line 

k  [or up-arrow] move cursor up one line 

0  (zero) move cursor to start of current line (the one with the cursor) 

$  move cursor to end of current line 

:0 or 1G move cursor to first line in file 

:$ or G move cursor to last line in file 

Screen Manipulation:

^f move forward one screen 

^b move backward one screen

Text Editor:

U          UNDO WHATEVER YOU JUST DID; a simple toggle

i           insert text before cursor, until hit 

I           insert text at beginning of current line, until hit

a          append text after cursor, until hit 

A          append text to end of current line, until hit 

o          open and put text in a new line below current line, until hit 

O          open and put text in a new line above current line, until hit

r           replace single character under cursor (no needed)

x          delete single character under cursor

dd        delete entire current line

D          delete the remainder of the line, starting with current cursor position

yy         copy (yank, cut) the current line into the buffer

p          put (paste) the line(s) in the buffer into the text after the current line

/string  search forward for occurrence of string in text

?string search backward for occurrence of string in text

Crontab

Cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These tasks are often termed as cron jobs in unix , solaris.

Crontab (CRON TABle) is a file which contains the schedule of cron entries to be run and at specified times.

Commands

export EDITOR=vi ;to specify a editor to open crontab file.

crontab -e Edit your crontab file, or create one if it doesn't already exist.

crontab -l Display your crontab file.

crontab -r Remove your crontab file.

crontab -v Display the last time you edited your crontab file. (This option is only available on a few systems.)

Syntax

A crontab file has five fields for specifying day , date and time followed by the command to be run at that interval.

* * * * * command to be executed

| | | | |

| | | | +---- day of week (0 - 6) (Sunday=0)

| | | +------ month (1 - 12)

| | +-------- day of month (1 - 31)

| +---------- hour (0 - 23)

+------------ min (0 - 59)

* in the value field above means all legal values as in braces for that column. 

The value column can have a * or a list of elements separated by commas. An element is either a number in the ranges shown above or two numbers in the range separated by a hyphen (meaning an inclusive range). 

Ex:

01 * * * * root echo "This command is run at one min past every hour"

17 8 * * * root echo "This command is run daily at 8:17 am"

17 20 * * * root echo "This command is run daily at 8:17 pm"

00 4 * * 0 root echo "This command is run at 4 am every Sunday"

* 4 * * Sun root echo "So is this"

42 4 1 * * root echo "This command is run 4:42 am every 1st of the month"

01 * 19 07 * root echo "This command is run hourly on the 19th of July"

Example

A line in crontab file like below removes the tmp files from /home/someuser/tmp each day at 6:30 PM.

30 18 * * * rm /home/someuser/tmp/* 

Changing the parameter values as below will cause this command to run at different time schedule below :

min hour day/month month day/week Execution time

30 0 1 1,6,12 * -- 00:30 Hrs on 1st of Jan, June & Dec.

:

0 20 * 10 1-5 --8.00 PM every weekday (Mon-Fri) only in Oct.

:

0 0 1,10,15 * * -- midnight on 1st ,10th & 15th of month

:

5,10 0 10 * 1 -- At 12.05,12.10 every Monday & on 10th of every month

:

Note : If you inadvertently enter the crontab command with no argument(s), do not attempt to get out with Control-d. This removes all entries in your crontab file. Instead, exit with Control-c.

Generate log file

To collect the cron execution execution log in a file :

30 18 * * * rm /home/someuser/tmp/* > /home/someuser/cronlogs/clean_tmp_dir.log

New df, du, and ls Options

The df, du, and ls commands have a new h option for displaying disk usage and file or file system sizes that are easy to understand.

The default form of the df command displays file system size in blocks (512 bytes). The df output, in kilobytes, follows:

$ df -k / /usr

Filesystem kbytes used avail capacity Mounted on

/dev/dsk/c0t0d0s0 192056 94788 78063 55% /

/dev/dsk/c0t0d0s6 1982988 829966 1093533 44% /usr

The same file system sizes displayed in powers of 1024 follows:

$ df -h / /usr

Filesystem size used avail capacity Mounted on

/dev/dsk/c0t0d0s0 188M 93M 76M 55% /

/dev/dsk/c0t0d0s6 1.9G 811M 1.0G 44% /usr

The default form of the du command displays disk space in blocks (512 bytes). The du output, in blocks, follows:

% du -s k*

100 kadmin

98 kadmin.local

98 kdb5_util

90 keyserv

10 killall

The same disk space displayed in powers of 1024 follows:

% du -h k*

50K kadmin

49K kadmin.local

49K kdb5_util

45K keyserv

5K killall

The default form of the ls -l command displays file size in bytes. Use the ls -lh command to display file size in powers of 1024:

% ls -lh k

-r-xr-xr-x 1 root bin 49K Nov 30 03:32 kadmin

-r-xr-xr-x 1 root bin 49K Nov 30 03:32 kadmin.local

-r-xr-xr-x 1 root bin 49K Nov 30 03:32 kdb5_util

-r-xr-xr-x 1 root sys 44K Nov 25 04:37 keyserv

-r-xr-xr-x 1 root bin 4.3K Nov 25 04:36 killall