UnixCommonTasks < UNIX

Unix Common Tasks

binary file editing

display settings / screen resolution changing
via GUI:

may depend on the system; in FedoraOS? on the command bar click System, then Display. You can set it to your desired resolution, etc.
on Fedora 8 running in VMWare, I had problems with on user account where the settings would not take. I would set to say 1600x1200, and upon restart it would continually revert to 1920x1200. There are some files in /etc/X11 you can edit, but even editing these didn't change it. I tried with other users, and they worked fine. So the problem seemed to be with this user. I used grep to search for files in home that matched the undesired resolution and found that you'll need to edit this file:
- /home/yourusername/.gconf/desktop/gnome/screen/default/0/%gconf.xml
  The grep command used was:
- $ sudo grep -Rls "1600x1200" /home

via command line:

error log checking

tail -f error_log

hex editor/editing

path

see current path - type:
```
echo $PATH
```
add directories to the path temporarily (for current session only)
- to add to the beginning of the path:
```
PATH=/my/new/begpath
```
- to add to the end of the path:
```
PATH=$PATH:/my/new/endpath
```
- to add to the beginning and end of the path:
```
PATH=/my/new/begpath:$PATH:/my/new/endpath
```
add directories to the path permanently (for current and all future sessions)
- edit the .bash_profile file in your home directory, and add the new directory to your PATH in that file
add directories to every users' path
- edit the /etc/profile file???

sudoers file, visudo, group wheel

allow group wheel to sudo:

as root (or sudo if you can) use visudo to edit the sudoer file
scroll to the bottom of the file, and you will see something like the following:
# Uncomment to allow people in group wheel to run all commands
# %wheel ALL=(ALL) ALL

set the wheel (sudoers file) for user jane:
[hholz@dayz ~]$ sudo -s Password:
[root@dayz ~]# usermod -G wheel jane

-- RobertSajan - 24 Apr 2008