Which command to shows list of all users and date the logged in a Linux system. I have tried last -a but its not showing the list of all users and date the logged.
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Is it possible to see the login history, i mean to see if someone has used the computer in my absence and when he used it . if it is possible, where can i get the log ? if not, is there a program that logs all the logins and their time ?
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With the ls command, is it possible to show only the files created after a specific date, hour...?  I'm asking it because I have a directory with thousand of files.  I want so see all files that were created since yesterday.   I use ls -ltr but I have to wait to see all files...  There is an equivalent of DIRECTORY/SINCE=date from OpenVMS ?
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Accidentally a rm -rf command was launched to my root directory instead of current directory. I stopped file removing by Ctrl+C but some files has already been removed. Is there a LINUX command to list all recently removed files from the system to get the affected applications ?  Operating System: CentOS 6.3
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Is there anyway I can list files by typing a command in the shell which lists all the file names, folder names and their permissions in CentOS?
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I made a mistake in the username at the time of installation. So I changed the name of the user after logging in by creating a guest account with SUDO rights. But when I checked the list of users using ls /home command I am not seeing the new name for the user instead Old name is appearing. But I use the new name to login.   Is it like I need to change the name inside Home directory separately? Also , if there is any other changes needs to be done .. ?
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Other than viewing the history, is there a way to filter my history?  Say I want to search for a command that started with "ssh"?
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I need a command to list all users as well as commands to add, delete and modify users from terminal - any commands that could help in administrating user accounts easily by terminal.
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Possible Duplicate:          Is there a command in Linux which displays when the file was created ? I see that ls -l gives the last modified time, but can I get the created time/date?
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How do I change my logname?For e.g: xyz@ubuntu in the terminal how do I change xyz? I have tried this command   usermod -l *newname* -d /home/*newname* -m *oldname*   but that gave me an error user xyz is currently used by process PID  Command line solutions are appreciated.
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Today I found something strange on my newly installed Windows 7 OS - my "users" folder C:\Users was shared and "Everyone" had full access... I disabled that and now it seems fine, however I'm a bit scared actually, I'd like to know what caused that and if my system is compromised.
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I need to list the process IDs on the Linux command line. Can I use the ls command in the /proc directory?  The problem is that it lists some process IDs with file names. Can I remove those names using some ls command option?
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On UNIX I can tell when I logged in and out of my workstation with the last command.  Is there a way to get the same information on my Windows workstation?  I notice that Cygwin has a last command, but wtmp doesn't seem to be populated.  Is there a way to get last working with Cygwin?  (If this can only be done programmatically, should the question be on StackOverflow?)
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I want to clear all previous commands from the history of my server. I used history -c and it seems all things are cleared but when I ssh to the server, all the commands are still there.  How can I clear them permanently?
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I am trying to learn PostgreSQL administration and have started learning how to use the psql command line tool.  When I log in with psql --username=postgres, how do I list all databases and tables?  I have tried \d, d and dS+ but nothing is listed. I have created two databases and a few tables with pgAdmin III, so I know they should be listed.
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How can I limit the login times in linux for certain users? For example I have to a user that only needs to be enabled from 8am till 5pm? Is there a way of automating this. My environment is a Centos server administered via webmin.
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I am creating a simple backup script. I would like to have a message saying "You last backed up x days ago" on login. I can create a file when I do the backup "backup/.last_backup_timestamp" but what format should I use and how would I find the difference in days between then and now in bash?  Thank-you
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I am hoping that somewhere in Active Directory the "last logged on from [computer]" is written/stored, or there is a log I can parse out?  The purpose of wanting to know the last PC logged on from is for offering remote support over the network - our users move around pretty infrequently, but I'd like to know that whatever I'm consulting was updating that morning (when they logged in, presumably) at minimum.  I'm also considering login scripts that write the user and computer names to a known location I can reference, but some of our users don't like to logout for 15 days at a time.  If there is an elegant solution that uses login scripts, definitely mention it - but if it happens to work for merely unlocking the station, that would be even better!