Posts Tagged shell
Merge many depots
Posted by Lincoln Zuljewic Silva in HP-UX on August 25th, 2009
When you have many depot files, you can create a single big depot and install it instead of install one by one.
Let’s assume that you need install the following depots, and they are all located in the directory /tmp/install/depots:
| autoconf-2.64-hppa-11.11.depot bison-2.4.1-hppa-11.11.depot gawk-3.1.7-hppa-11.11.depot sed-4.2.1-hppa-11.11.depot tcltk-8.5.7-hppa-11.11.depot texinfo-4.13-hppa-11.11.depot zip-3.0-hppa-11.11.depot |
To create a single depot, run the follow commands:
| cd /tmp/install/ for i in `ls depots/*.depot` ;do swcopy -s /tmp/install/$i \* @/tmp/install/big;done |
Now, to install it, you can use:
| swinstall -s /tmp/install/big |
rlogin access denied
Posted by Lincoln Zuljewic Silva in Linux on June 15th, 2009
In some specific situations, you need use rlogin to remote access a server, but you can face the following error:
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clientServer:~ # rlogin rloginServer Password: Password: Login incorrect
login: root Password: Login incorrect
login: root Password: Login incorrect
login: root Password:
Login incorrect rlogin: connection closed. |
If you check the /var/log/secure log on the “rloginServer”, you will find the following messages:
|
Jun 15 10:44:41 rloginServer rlogind[16640]: pam_securetty(rlogin:auth): access denied: tty ‘rlogin’ is not secure ! Jun 15 10:44:41 rloginServer rlogind[16640]: pam_rhosts_auth(rlogin:auth): denied to root@10.11.4.9 as root: access not allowed Jun 15 10:44:47 rloginServer login: pam_securetty(remote:auth): access denied: tty ‘pts/0′ is not secure ! Jun 15 10:44:51 rloginServer login: FAILED LOGIN 1 FROM 10.11.4.9 FOR root, Authentication failure Jun 15 10:44:53 rloginServer login: pam_securetty(remote:auth): access denied: tty ‘pts/0′ is not secure ! Jun 15 10:44:58 rloginServer login: FAILED LOGIN 2 FROM 10.11.4.9 FOR root, Authentication failure Jun 15 10:44:58 rloginServer login: pam_unix(remote:auth): bad username [] Jun 15 10:44:58 rloginServer login: pam_succeed_if(remote:auth): error retrieving information about user Jun 15 10:44:58 rloginServer login: FAILED LOGIN 3 FROM 10.11.4.9 FOR , User not known to the underlying authentication module Jun 15 10:44:59 rloginServer login: pam_unix(remote:auth): bad username [] Jun 15 10:44:59 rloginServer login: pam_succeed_if(remote:auth): error retrieving information about user Jun 15 10:44:59 rloginServer login: FAILED LOGIN SESSION FROM 10.11.4.9 FOR , User not known to the underlying authentication module
|
The problem here, is that “rlogin” is not a “secure” shell. To configure it, you should add “rlogin” (without the quotes) to /etc/securetty .
After that, you will be able to access the rlogin server.
Setting session timeout on Linux
Posted by Lincoln Zuljewic Silva in Linux on May 27th, 2009
To set an automatically shell timeout on Linux (that Will logoff that session after X seconds), you just need setup the following variable (put it in your /etc/profile):
|
echo “TMOUT=300; readonly TMOUT; export TMOUT” >> /etc/profile |
The “readonly” option will not allow an normal user change (ou unset) it.
Rotate log files in Linux
Posted by Lincoln Zuljewic Silva in Linux on May 15th, 2009
An easy way to rotate log files in Linux can be:
|
#!/bin/bash # Include the following line in crontab: #00 5 * * * /bin/rotate_logs.sh > /dev/null 2>&1 #
DATE=`date “+%Y%m%d”`
cd /var/log/
for i in messages secure cron lastlog do cp ${i} ${i}.${DATE} > ${i} gzip -9 ${i}.${DATE} done
/etc/init.d/syslog restart
|
If you have any other log to rotate, you can change the line 8 and 10.
Disable CTRL+C on Linux
Posted by Lincoln Zuljewic Silva in Linux on April 30th, 2009
To disable CTRL+C on Linux, you can use the following command:
|
stty intr undef |
