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Top Forums UNIX for Dummies Questions & Answers How to edit a file on a UNIX Server Post 302827743 by Don Cragun on Sunday 30th of June 2013 02:41:41 PM
Old 06-30-2013
Quote:
Originally Posted by vinil
Hi
View/Edit a file in unix is quite easy indeed.You may like the following to use
1 cat <file_name>
2 cat><filename>
3 vi <filename>

Note that 1st option is to VIEW file only.You will not be able to write in this mode.
2nd and 3rd options make you enable to edit a file.
Be cautious when you edit a file using 3rd option as it may need a bit more knowledge about VI editor prior to use.
But there is no harm in using the 2nd option mentioned above
thanks .
Suggesting redirecting output from the cat utility to edit a file is an EXTREMELY dangerous suggestion for a new user. The first thing that the command:
Code:
cat > filename

does is delete everything in the file named filename. The user then has to retype the exact original contents of every line in the original file except for the changes to be made to the single line that you want to change.
This User Gave Thanks to Don Cragun For This Post:
 

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BZEXE(1)						      General Commands Manual							  BZEXE(1)

NAME
bzexe - compress executable files in place SYNOPSIS
bzexe [ name ... ] DESCRIPTION
The bzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``bzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
bzip2(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
bzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. BZEXE(1)
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