ATENÇÃO: Para ver os comentários sobre esta e a discussão extensa sobre isso, que inclui tudo o que foi tentado, por favor veja esta sala de bate-papo .
Hoje, quando executei o comando cat , em vez do conteúdo de um arquivo, recebi:
Hello, nothing to see here! Move along!
Verifiquei se o arquivo cat não foi alterado depois da última vez que o usei, por isso estou certo de que o arquivo cat em /bin não foi alterado, portanto, algo mais deve estar sendo executado quando eu digito cat , em vez do programa cat adequado ... Mas eu não vejo como isso poderia ter acontecido ...
Então eu pensei que deveria perguntar aqui sobre isso, então, por que isso está acontecendo e como posso consertar isso?
Atualização de informações:
Eu verifiquei no meu arquivo .bash_aliases , e não há alias cat nem um no meu arquivo .bashrc que aponta para o alias correto.
A saída de strings $(command -v cat) é:
#!/bin/bash
echo "Hello, nothing to see here! Move along!"
A saída de type cat é:
cat is /bin/cat
O sha256sum do arquivo cat é:
a80c46f9c73190d6b46bdf444ade76d05ce113a21dbab7b805dde5027816aa48
A saída de strace cat é:
execve("/bin/cat", ["cat"], [/* 61 vars */]) = 0
brk(0) = 0x1833000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b44e000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=122452, ...}) = 0
mmap(NULL, 122452, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0f0b430000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "7ELF/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/neo/jdk1.8.0_45/bin
XDG_VTNR=7
XDG_SESSION_ID=c2
CLUTTER_IM_MODULE=xim
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/neo
SESSION=ubuntu
GPG_AGENT_INFO=/run/user/1000/keyring/gpg:0:1
TERM=xterm
SHELL=/bin/bash
VTE_VERSION=3803
WINDOWID=81788939
UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/1000/1640
GNOME_KEYRING_CONTROL=
GTK_MODULES=overlay-scrollbar:unity-gtk-module
USER=neo
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path
XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/neo/jdk1.8.0_45/bin
DESKTOP_SESSION=ubuntu
QT_IM_MODULE=ibus
QT_QPA_PLATFORMTHEME=appmenu-qt5
XDG_SESSION_TYPE=x11
JOB=unity-settings-daemon
PWD=/home/neo
XMODIFIERS=@im=ibus
GNOME_KEYRING_PID=
LANG=en_GB.UTF-8
GDM_LANG=en_GB
MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path
IM_CONFIG_PHASE=1
COMPIZ_CONFIG_PROFILE=ubuntu
JAVA_TOOL_OPTIONS=-javaagent:/usr/share/java/jayatanaag.jar
GDMSESSION=ubuntu
SESSIONTYPE=gnome-session
XDG_SEAT=seat0
HOME=/home/neo
SHLVL=1
LANGUAGE=en_GB:en
GNOME_DESKTOP_SESSION_ID=this-is-deprecated
UPSTART_INSTANCE=
UPSTART_EVENTS=xsession started
XDG_SESSION_DESKTOP=ubuntu
LOGNAME=neo
COMPIZ_BIN_PATH=/usr/bin/
QT4_IM_MODULE=xim
XDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-9BqFSNNHkf
LESSOPEN=| /usr/bin/lesspipe %s
INSTANCE=
UPSTART_JOB=unity7
XDG_RUNTIME_DIR=/run/user/1000
DISPLAY=:0
XDG_CURRENT_DESKTOP=Unity
GTK_IM_MODULE=ibus
LESSCLOSE=/usr/bin/lesspipe %s %s
HISTTIMEFORMAT=%d/%m/%y %T
XAUTHORITY=/home/neo/.Xauthority
_=/usr/bin/printenv
Description: Ubuntu 15.04
Release: 15.04
coreutils:
Installed: 8.23-3ubuntu1
Candidate: 8.23-3ubuntu1
Version table:
*** 8.23-3ubuntu1 0
500 http://gb.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
100 /var/lib/dpkg/status
%pre%%pre%%pre%%pre%%pre%>%pre%%pre%%pre%%pre%'\v%pre%%pre%%pre%%pre%%pre%"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1869392, ...}) = 0
mmap(NULL, 3972864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f0f0ae63000
mprotect(0x7f0f0b023000, 2097152, PROT_NONE) = 0
mmap(0x7f0f0b223000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7f0f0b223000
mmap(0x7f0f0b229000, 16128, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b229000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b42f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b42e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b42d000
arch_prctl(ARCH_SET_FS, 0x7f0f0b42e700) = 0
mprotect(0x7f0f0b223000, 16384, PROT_READ) = 0
mprotect(0x60b000, 4096, PROT_READ) = 0
mprotect(0x7f0f0b450000, 4096, PROT_READ) = 0
munmap(0x7f0f0b430000, 122452) = 0
brk(0) = 0x1833000
brk(0x1854000) = 0x1854000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=5418528, ...}) = 0
mmap(NULL, 5418528, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f0f0a938000
close(3) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 14), ...}) = 0
fstat(0, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 14), ...}) = 0
fadvise64(0, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
mmap(NULL, 139264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0f0b40b000
read(0,
Outra coisa que notei é que esse problema não afeta outros usuários no sistema.
echo $PATH de saídas:
%pre%
A saída de printenv é:
%pre%
Informações do sistema operacional:
%pre%
Informações do pacote:
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