How to Mount an Uploaded ISO file in Linux
If you were limited to access /dev/cdrom, you can still utilize the content of an ISO by uploading and mounting it. The syntax is as… Read More »How to Mount an Uploaded ISO file in Linux
Linux – Administration
How Linux Set Date Time Command
Sometimes, you can't use NTP to adjust your server time, you can change it by a command line. [root@rac1 ~]# date -s '2017-02-18 17:30:00' Sat… Read More »How Linux Set Date Time Command
426 Transfer aborted. Data connection closed.
When I retrieved a file from a remote host, ftp aborted the transfer immediately....ftp> get alertORCL.log200 PORT command successful.150 Opening data connection for alertORCL.log (3347200… Read More »426 Transfer aborted. Data connection closed.
How to Compare Contents of Two Directories
After you copied one directory to another like this:$ cp -rp /path/to/source/directory /path/to/target/or mirrored the source directory to the target one.$ rsync -av /path/to/source/directory/ /path/to/target/directory/You… Read More »How to Compare Contents of Two Directories
When Backspace Key is Not Working in Console
If your Backspace key is not working in the current console, you may try the following ways to work around it:Ctrl + BackspaceCtrl + HCtrl +… Read More »When Backspace Key is Not Working in Console
How to Shrink XFS File System on Enterprise Linux 7.2
Why XFS File System Cannot be Shrunk Directly? Why cannot we just lvreduce XFS file system? A quote from Red Hat official document talking about… Read More »How to Shrink XFS File System on Enterprise Linux 7.2
How to Kill All Background Processes in One Command on Linux
For executing batch jobs invisibly, system administrators usually schedule jobs in crontab or execute them in the background. Of course you can use fg to… Read More »How to Kill All Background Processes in One Command on Linux
How to Authorize Users to Use Crontab
Check /etc/cron.deny first If there's no /etc/cron.allow in your system, please make sure the user (e.g. oracle) that we would like to authorize it here… Read More »How to Authorize Users to Use Crontab
How to Backup RMAN Configuration Daily
Backup RMAN Configuration RMAN can backup almost everything at any state of execution time, includes data, archive logs, even control file and spfile, but I… Read More »How to Backup RMAN Configuration Daily
How to Resolve Crontab Error crontab: installing new crontab "/tmp/crontab.vqE76q":1: bad command errors in crontab file, can't install.
crontab: installing new crontab When I tried to save and quit editing crontab, I met an error like this: [oracle@test ~]$ crontab -e crontab: installing… Read More »How to Resolve Crontab Error crontab: installing new crontab "/tmp/crontab.vqE76q":1: bad command errors in crontab file, can't install.