08-18-2008
What are you trying to achieve?
An executable which has no dependancies on shared libraries/objects?
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1. Shell Programming and Scripting
Hello,
I have 8 sql loader scripts which produce ".bad" file if there is any errors, how can I join the contents of these files together in one column?
file 1
CA-94061-TSS Tkb Sport Shop
CA-95133-V Vollyrite ... (3 Replies)
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2. Shell Programming and Scripting
Hi,
I want to select columns from multiple files and combine them in one file. The files are simulation-data-files with 23 columns each and about 50 rows. I now use:
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Hello,
I have a number of tab delimited data files consists of two columns. Like that:
File1
800.000000 0.002744
799.000000 0.002517
798.000000 0.002836
797.000000 0.002553
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800.000000 0.000261
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798.000000 0.000551
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4. Shell Programming and Scripting
Hello,
I am new to unix and need help with a problem. I have 2 files each containing multiple columns of information ie;
File 1 :
A B C D E
1 2 3 4 5
File 2 :
F G
6 7
I would like to merge the information from File 2 to File 1 so that the data reads as follows;
File 1:
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5. Shell Programming and Scripting
I have been working of this script for a very long time and I have searched the internet for direction but I am stuck here.
I have about 3000 files with two columns each. The length of each file is 50000. Each of these files is named this way b.4, b.5, b.6, b.7, b.8, b.9, b.10, b.11, b.12... (10 Replies)
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6. Shell Programming and Scripting
Hi guys,
I have very basic linux experience so I need some help with a problem.
I have 3 files from which I want to extract columns based on common fields between them.
File1:
--- rs74078040 NA 51288690 T G 461652 0.99223 0.53611 3
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7. Shell Programming and Scripting
I just tried following
ls *.dat|sort -t"_" -k2n,2|while read f1 && read f2; do
awk '{print}' $f1
awk FNR==1'{print $1,$2,$3,$4,$5,"*","*","*" }' OFS="\t" $f2
awk '{print}' $f2
donegot following result
18-Dec-1983 11:45:00 AM 18.692 84.672 0 25.4 24
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Hi,
I'm not a regular coder but some times I write some basic perl script, hence Perl is bit difficult for me :).
I'm merging two files a.txt and b.txt into c.txt:
a.txt
------
x001;frtb70;xyz;109
x001;frvt65;sec;239
x003;wqax34;jul;659
x004;yhud43;yhn;760
b.txt
------... (8 Replies)
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Hello guys,
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CSV1:
Breaking.csv:
UTF-8
"Name","Description","Occupation","Email"
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CSV2:
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10. Shell Programming and Scripting
Hi guys,
could you please help me with this?
I have multiple files with this structure:
file1
xxx1 1.0
xxx2 3.5
xxx3 2.4
xxx4 3.0
…
xxx1890 5.7
file2
xxx1 8.0
xxx3 7.5
xxx4 5.5
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LDD(1) Linux Programmer's Manual LDD(1)
NAME
ldd - print shared object dependencies
SYNOPSIS
ldd [option]... file...
DESCRIPTION
ldd prints the shared objects (shared libraries) required by each program or shared object specified on the command line. An example of
its use and output is the following:
$ ldd /bin/ls
linux-vdso.so.1 (0x00007ffcc3563000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f87e5459000)
libcap.so.2 => /lib64/libcap.so.2 (0x00007f87e5254000)
libc.so.6 => /lib64/libc.so.6 (0x00007f87e4e92000)
libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f87e4c22000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f87e4a1e000)
/lib64/ld-linux-x86-64.so.2 (0x00005574bf12e000)
libattr.so.1 => /lib64/libattr.so.1 (0x00007f87e4817000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f87e45fa000)
In the usual case, ldd invokes the standard dynamic linker (see ld.so(8)) with the LD_TRACE_LOADED_OBJECTS environment variable set to 1.
This causes the dynamic linker to inspect the program's dynamic dependencies, and find (according to the rules described in ld.so(8)) and
load the objects that satisfy those dependencies. For each dependency, ldd displays the location of the matching object and the (hexadeci-
mal) address at which it is loaded. (The linux-vdso and ld-linux shared dependencies are special; see vdso(7) and ld.so(8).)
Security
Be aware that in some circumstances (e.g., where the program specifies an ELF interpreter other than ld-linux.so), some versions of ldd may
attempt to obtain the dependency information by attempting to directly execute the program, which may lead to the execution of whatever
code is defined in the program's ELF interpreter, and perhaps to execution of the program itself. (In glibc versions before 2.27, the
upstream ldd implementation did this for example, although most distributions provided a modified version that did not.)
Thus, you should never employ ldd on an untrusted executable, since this may result in the execution of arbitrary code. A safer alterna-
tive when dealing with untrusted executables is:
$ objdump -p /path/to/program | grep NEEDED
Note, however, that this alternative shows only the direct dependencies of the executable, while ldd shows the entire dependency tree of
the executable.
OPTIONS
--version
Print the version number of ldd.
-v, --verbose
Print all information, including, for example, symbol versioning information.
-u, --unused
Print unused direct dependencies. (Since glibc 2.3.4.)
-d, --data-relocs
Perform relocations and report any missing objects (ELF only).
-r, --function-relocs
Perform relocations for both data objects and functions, and report any missing objects or functions (ELF only).
--help Usage information.
BUGS
ldd does not work on a.out shared libraries.
ldd does not work with some extremely old a.out programs which were built before ldd support was added to the compiler releases. If you
use ldd on one of these programs, the program will attempt to run with argc = 0 and the results will be unpredictable.
SEE ALSO
pldd(1), sprof(1), ld.so(8), ldconfig(8)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
2017-09-15 LDD(1)