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I am in the process of compiling vsftpd, but keep getting this error:

[alex@lab vsftpd-3.0.3]$ make
gcc -o vsftpd main.o utility.o prelogin.o ftpcmdio.o postlogin.o \
privsock.o tunables.o ftpdataio.o secbuf.o ls.o postprivparent.o logging.o \
str.o netstr.o sysstr.o strlist.o banner.o filestr.o parseconf.o secutil.o \
ascii.o oneprocess.o twoprocess.o privops.o standalone.o hash.o tcpwrap.o \
ipaddrparse.o access.o features.o readwrite.o opts.o ssl.o sslslave.o \
ptracesandbox.o ftppolicy.o sysutil.o sysdeputil.o seccompsandbox.o \
-Wl,-s -fPIE -pie -Wl,-z,relro -Wl,-z,now 

./vsf_findlibs.sh

/usr/bin/ld: cannot find -lcap

collect2: error: ld returned 1 exit status

make: *** [vsftpd] Error 1

I installed libpcap 1.9.0, yet the error persists.

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Since you're building code from source, you need the libcap.so unversioned shared library. These are typically provided as part of the corresponding -devel package. If you're not sure of the package name, you can run something like:

sudo yum install /usr/lib64/libcap.so

Although in this case, the answer is that you simply need to install the libcap-devel package:

sudo yum install libcap-devel
  • That makes sense! However - I should have mentioned this in my first post - I am working on a system that is not connected to the Internet. Hence me downloading the necessary library tar files and transferring them onto the target system manually. On the target system, I then run make, which leads me to the error. – Alex Teichmann Feb 11 at 19:50
  • I don't think that changes the nature of the error or the solution. Download the libcap-devel package, transfer it to the target system, and install it. However, you should also be able to create a symlink to the existing versioned library, like ln -s libcap.so.2 /usr/lib64/libcap.so. – larsks Feb 11 at 21:34

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