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E

• _Exit(), _exit — terminate a process
• echo — write arguments to standard output
• ed — edit text
• encrypt() — encoding function (CRYPT)
• endgrent(), getgrent, setgrent — group database entry functions
• endhostent(), gethostent, sethostent — network host database functions
• endian.h — system endianness
• endnetent(), getnetbyaddr, getnetbyname, getnetent, setnetent — network database functions
• endprotoent(), getprotobyname, getprotobynumber, getprotoent, setprotoent — network protocol database functions
• endpwent(), getpwent, setpwent — user database functions
• endservent(), getservbyname, getservbyport, getservent, setservent — network services database functions
• endutxent(), getutxent, getutxid, getutxline, pututxline, setutxent — user accounting database functions
• env — set the environment for command invocation
• environ, execl, execle, execlp, execv, execve, execvp, fexecve — execute a file
• erand48(), drand48, jrand48, lcong48, lrand48, mrand48, nrand48, seed48, srand48 — generate uniformly distributed pseudo-random numbers
• erf(), erff, erfl — error functions
• erfc(), erfcf, erfcl — complementary error functions
• erfcf(), erfc, erfcl — complementary error functions
• erfcl(), erfc, erfcf — complementary error functions
• erff(), erf, erfl — error functions
• erfl(), erf, erff — error functions
• errno — error return value
• errno.h — system error numbers
• eval — construct command by concatenating arguments
• ex — text editor
• exec — perform redirections in the current shell or execute a utility
• execl(), environ, execle, execlp, execv, execve, execvp, fexecve — execute a file
• execle(), environ, execl, execlp, execv, execve, execvp, fexecve — execute a file
• execlp(), environ, execl, execle, execv, execve, execvp, fexecve — execute a file
• execv(), environ, execl, execle, execlp, execve, execvp, fexecve — execute a file
• execve(), environ, execl, execle, execlp, execv, execvp, fexecve — execute a file
• execvp(), environ, execl, execle, execlp, execv, execve, fexecve — execute a file
• exit — cause the shell to exit
• exit() — terminate a process
• exp(), expf, expl — exponential function
• exp2(), exp2f, exp2l — exponential base 2 functions
• exp2f(), exp2, exp2l — exponential base 2 functions
• exp2l(), exp2, exp2f — exponential base 2 functions
• expand — convert tabs to spaces
• expf(), exp, expl — exponential function
• expl(), exp, expf — exponential function
• expm1(), expm1f, expm1l — compute exponential functions
• expm1f(), expm1, expm1l — compute exponential functions
• expm1l(), expm1, expm1f — compute exponential functions
• export — set the export attribute for variables
• expr — evaluate arguments as an expression

• 3.116 Effective Group ID
• 3.117 Effective User ID
• 3.118 Eight-Bit Transparency
• 3.119 Empty Directory
• 3.120 Empty Line
• 3.121 Empty String (or Null String)
• 3.122 Empty Wide-Character String
• 3.123 Encoding Rule
• 3.124 Entire Regular Expression
• 3.125 Epoch
• 3.126 Equivalence Class
• 3.127 Era
• 3.128 Event Management
• 3.129 Executable File
• 3.130 Execute
• 3.131 Execution Time
• 3.132 Execution Time Monitoring
• 3.133 Expand
• 3.134 Extended Regular Expression (ERE)
• 3.135 Extended Security Controls
• 4.6 Extended Security Controls
• 8. Environment Variables
• 8.1 Environment Variable Definition
• 9.4 Extended Regular Expressions