10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi,
I need a help. I used this command to list all the log files which are for more than 10 days to a text file.
find /usr/script_test -type f -mtime +10>>/usr/ftprm.txt
I want all these files listed in the ftprm.txt to be ftp in another machine and then rm the files.
Anyone can help me... (8 Replies)
Discussion started by: kamaldev
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2. Red Hat
ENVIROMENT
Linux: Fedora Core release 1 (Yarrow)
iPlanet: iPlanet-WebServer-Enterprise/6.0SP1
Log Path: /usr/iplanet/servers/https-company/logs
I have iPlanet log rotation enabled rotating files on a daily basis.
The rotated logs are NOT compressed & are taking up too much space.
I... (7 Replies)
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3. Shell Programming and Scripting
Hi all
i want to write program with shell script that able compare two file content and if one of lines of file have # at the first of string or nothing find same string in one of two file . remove the line in second file that have not the string in first file. for example:
file... (2 Replies)
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4. UNIX for Dummies Questions & Answers
Hi All,
I need to delete the oldest file in folder when the file count in the folder exceed 6 ( i have a process that puts the source files into this folder )
E.x : Folder : /data/opt/backup
01/01/2012 a.txt
01/02/2012 b.txt
... (1 Reply)
Discussion started by: akshay01987
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5. Shell Programming and Scripting
Need unix commands to delete records from one file if the same record present in another file...
just like join ... if the record present in both files.. delete from first file or delete the particular record and write the unmatched records to new file..
tried with grep and while... (6 Replies)
Discussion started by: msathees
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6. Shell Programming and Scripting
I have two files
File1
====
1|2000-00-00|2010-02-02||
2| 00:00:00|2012-02-24||
3|2000-00-00|2011-02-02||
File2
====
2000-00-00
00:00:00
I want the delete the patterns which are found in file 2 from file 1,
Expected output:
File1
==== (5 Replies)
Discussion started by: machomaddy
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7. Homework & Coursework Questions
1. The problem statement, all variables and given/known data:
When looking for corefiles, include any file with core in its name. (Some UNIX/Linux systems add the PID of the process that created the core to reduce the chances of overwriting an already existing core file that might be needed. The... (6 Replies)
Discussion started by: s3270226
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8. Solaris
I know how to check if any file has a unix process using a file by looking at 'lsof <fullpath/filename>' command.
I think using lsof is very expensive. Also to make it accurate we need to inlcude fullpath of the file.
Is there another command that can tell if a file has a truely active... (12 Replies)
Discussion started by: kchinnam
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9. Shell Programming and Scripting
I have a control file which looks like this
LOAD DATA
INFILE '/array/data/data_Finished_T5_col_change/home/oracle/emp.dat'
PRESERVE BLANKS
INTO TABLE SCOTT.EMP
FIELDS TERMINATED BY '|' OPTIONALLY ENCLOSED BY '"' TRAILING NULLCOLS
(.................
..................)
How can i edit the... (1 Reply)
Discussion started by: mwrg
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10. Shell Programming and Scripting
Hi all
I currently use the following in shell.
#!/bin/sh
while read LINE
do
perl -i -ne "$/ = ''; print if !m'Using archive: ${LINE}'ms;" "datafile"
done < "listfile"
NOTE the single quote delimiters in the expression. It's highly likely the 'LINE' may very well have characters in it... (3 Replies)
Discussion started by: Festus Hagen
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chmod(1) General Commands Manual chmod(1)
Name
chmod - change file mode
Syntax
chmod [ -fR ] mode file...
Description
Permissions on files are set according to mode and file parameters.
For file, you can specify either a full or partial path. You can specify multiple files, separated by spaces.
For mode, you specify one of two variants: absolute mode or symbolic mode.
Absolute Mode
For mode in absolute form, you specify an octal number constructed from the sum of one or more of the following values:
4000 set user ID on execution (applies to executable files only)
2000 set group ID on execution (applies to executable files only)
1000 set sticky bit (see for more information)
0400 read by owner
0200 write by owner
0100 execute, or search if file is a directory, by owner
0040 read by group
0020 write by group
0010 execute, or search if file is a directory, by group
0004 read by others
0002 write by others
0001 execute, or search if file is a directory, by others
For example, the absolute mode value that provides read, write, and execute permission to owner, read and execute permission to group, and
read and execute permission to others is 755 (400+200+100+40+10+4+1). The absolute mode value that provides read, write, and execute per-
mission to owner and no permission to group or others is 700 (400+200+100).
Symbolic Mode
To specify mode in symbolic form, use the following format:
[who] op permission [op permission] ... Spaces are included in the preceding format so that you can read the arguments; however, as
will be shown in examples that follow, you do not enter spaces between mode arguments.
Specify who using the letters u (for owner), g (for group) and o (for others) either alone or in combination. You can also specify the
letter a (for all), which is is equivalent to the letter combination ugo. If you omit the who parameter, a is assumed. For more informa-
tion, see
For the op parameter, specify the plus sign (+) to add permission to the file's mode, the minus sign (-) to remove permission from the
file's mode, or the equal sign (=) to assign permission absolutely (denying or revoking any permission not explicitly specified following
the equal sign). The first command in the following example provides group with execute permission for in addition to any other permis-
sions group currently has for The second command limits the permission that group has for to execute alone:
chmod g+x filea
chmod g=x fileb
For the permission parameter, specify any combination of the letters r (read), w (write), x (execute), s (set owner or group id), and t
(save text - sticky). Alternatively, you can specify the letter u, g, or o to set permission for the who parameter to be the same as the
permission currently granted to the user category indicated by the letter. In the following example, the group (g) is given the same per-
missions on as currently granted to owner (u):
chmod g=u filea
You can revoke all permissions by specifying the who argument followed by =, and omitting the permission argument. For example, the fol-
lowing command removes all permissions from others for
chmod o= fileb
When specifying more than one symbolic mode for file, separate the modes with commas. The mode changes are applied in the sequence speci-
fied. In the following example, write permission is added to the permissions already granted to the owner of and group is then granted the
same permissions on as granted the owner:
chmod u+w,g=u filea
Options
-f Inhibits display of errors that are returned if fails to change the mode on a file.
-R Causes to recursively descend any directories subordinate to file and to set the specified mode for each file encountered. However,
when symbolic links are encountered, does not change the mode of the link file and does not traverse the path associated with the
link. Note that the option is useful only when file identifies a directory that is not empty.
Restrictions
The permission letter s is used only with who letter u or g.
Only the owner of a file or someone logged on as superuser may change the mode of that file.
Examples
Using absolute mode, provide read, write, and search permission to the owner, and read and search permission to others for a directory
named
chmod 755 ~harris/public
Using absolute mode, set the UID for execution to be the UID of of the file owner rather than the UID of the user running the program as
follows:
chmod 4000 progrmb
Using symbolic mode, perform the same operation as described for the preceding example:
chmod u=s progrmb
Using symbolic mode, deny write permission to others for the file
chmod o-w ourspec
Using symbolic mode, give execute permission on file to all user categories:
chmod +x myprog
Using symbolic mode, give write permission to all group members, deny write permission to others, and give search permission to owner on
chmod g+w,o-r,u+x docdir
Using symbolic mode, give read and execute permissions to others for a directory named and then recursively descend the paths subordinate
to adding the same permissions for others on all files and directories included in the subordinate paths:
chmod -R o+rx programs
In the preceding example, if were the name of a file rather than a directory, would change the mode only of the file.
See Also
ls(1), chmod(2), stat(2), umask(2), chown(8)
chmod(1)