I‘m using the date +’%D_%T’ to store Unix system date and time in a shell variable called $_now:
_now=”$(date +’%D_%T’)”
echo $_nowOutputs:
01/20/12_16:10:42
I’d like to replace / and : with _. I’m aware of the following sed command:
sed ‘s/\//_/g
> s/:/_/g’ <<<"$_now"Outputs:
01_20_12_16_14_09
How do I specify two pattern within the same sed command to replace | and : with _ so that I can get output as 01_20_12_16_10_42?
{ 1 comment }
How do I find out my server name (machine name) under Linux operating systems using command shell?
{ 0 comments }
How do I install Google Chrome browser under Linux operating systems? How do I install google-chrome-beta_current_amd64.deb or google-chrome-beta_current_x86_64.rpm file under Linux?
{ 18 comments }
How do I find out serial number information for my hard disk under Ubuntu Linux Gnome desktop environment?
{ 4 comments }
I need to count one character at a time from input.txt. How do I read one character at a time under Linux / UNIX bash shell script?
{ 3 comments }
I‘ve recently noticed that two of my former employees are still accessing one of our Linux box. Old user account wasn’t deleted because it has some important files. How do I make sure account get deleted without losing files and email stored in the account? Can you describe a terminations clearance policy for an employee account including email accounts, forwarding aliases, ssh / ftp, and access to vpn dialup services under Red Hat Enterprise Linux server?
{ 6 comments }
When I run hdparm -tT /dev/sda command under CentOS / RHEL I get the following error on screen:
/dev/sda:
Timing buffered disk reads: 908 MB in 3.00 seconds = 302.39 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
How do I fix this problem?
{ 0 comments }
