Background

Related Pages

• LaTeX HOWTOs

HOWTOs

Determine Your Red Hat Version

• Best method
  rpm -qi redhat-release
• Alternative method
  cat /etc/issue

Determine Your Linux Kernel Version

• uname -r

Determine Your MAC Address

• /sbin/ifconfig eth0

Recursively Grep All Files Matching a find Regular Expression

• In the C shell, add the following alias:
  alias findgrep 'find . -name "\!:1" | xargs grep -n \!:2* /dev/null'
• In the bash shell, add the following function:

  function findgrep {
     for i in `find . -name "${1}"`;
     do grep -H -n "${2}" $i;
     done;
  };

  Note: If you input a wildcard to find (e.g., *.h), you may need to put quotes around it (e.g., findgrep "*.h" my_string) to avoid having Bash to an automatic wildcard expansion.

Print on One Side or Both Sides of the Paper

• Use one of the following lpr options depending on what you want to do:
  -o sides=one-sided
  -o sides=two-sided-short-edge
  -o sides=two-sided-long-edge
  

Print Text Files Two Per Page With Tabstops Set to Three

• In the C shell, add the following alias:
  alias enscript2 'enscript -2G -Pps4s -r -T 3 -M Letter'

Print Two Pages Per Sheet

• Instead of using lpr to print, use the following command:
  mpage -2
  The -2 can be replaced with -4 or -8 for more pages per sheet. This command can be used as the print command in Adobe's Acrobat Reader in Linux to print PDFs two sheets per page.

Print "Pretty" Text Files Two Pages Per Sheet With Tabstops Set to Three

• In the C shell, add the following alias:
  alias enscript2 'enscript -2G -Pps4s -r -T 3 -M Letter'

Append (or Prepend) to Your PATH Variable

• C Shell
  setenv PATH "${PATH}:/path/to/be/added/"
  setenv PATH "/path/to/be/added/:${PATH}"
• Bash Shell
  export PATH=/path/to/be/added/:$PATH
  export PATH=$PATH:/path/to/be/added/

Undo in VIM

• This page has an overview of the commands:
  • u = undo [count] changes
  • :u[ndo] = undo one change
  • CTRL-R = Redo [count] changes which were undone
  • :red[o] = Redo one change which was undone
  • U = Undo all latest changes on one line

Apply Patches To Older Versions of Red Hat

• If you need to install Red Hat 9 and try to use its up2date utility to apply patches to a fresh installation, you get errors due to an expired SSL certificate. To receive these updates, download the RPMs from this page and install them.

Finding Recently Installed RPM packages

• As its title state, this page has some handy RPM queries. To find packages installed within the past, say, 14 days, do:
  find /bin -type f -mtime -14 | rpm -qF
• To list RPMs chronologically by when they were installed, most recent first (the entire command goes on one line):
  rpm -qa --queryformat '%{installtime} %{name}-%{version}-%{release} %{installtime:date}\n' | sort -nr +1 | sed -e 's/^[^ ]* //'

Setting Format Options in VIM

• Bascially, this is just a copy the VIM help section about how to set the format options. I can never seem to remember how to set them the way I like them when typing bulleted list text files. I want the bulleted lists to autowrap and keep the automatic indention from line-to-line, but not to insert comment leaders.
  :set fo=tq
  For the VIM help section, do:
  :help fo-table