Establecer ulimit-n para archivos abiertos

#!/bin/bash
# change value for your limit open files:
openfiles="65535"
# backup .conf files:
cp -f /etc/security/limits.conf{,.bak}
cp -f /etc/systemd/system.conf{,.bak}
cp -f /etc/systemd/user.conf{,.bak}
cp -f /etc/sysctl.conf{,.bak}
# adding parameters
sh -c 'echo "* soft  nproc   '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "* hard  nproc   '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "* soft  nofile  '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "* hard  nofile  '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "root  soft  nproc   '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "root  hard  nproc   '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "root  soft  nofile  '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "root  hard  nofile  '$openfiles'" >> /etc/security/limits.conf'
sh -c 'echo "DefaultLimitNOFILE='$openfiles'" >> /etc/systemd/system.conf'
sh -c 'echo "DefaultLimitNOFILE='$openfiles'" >> /etc/systemd/user.conf'
sh -c 'echo "fs.file-max = '$openfiles'" >> /etc/sysctl.conf'
sh -c 'echo "net.core.somaxconn = '$openfiles'" >> /etc/sysctl.conf'